diff --git a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/AttachmentServiceImpl.kt b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/AttachmentServiceImpl.kt
index a7b9ac1..d4cd02e 100644
--- a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/AttachmentServiceImpl.kt
+++ b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/AttachmentServiceImpl.kt
@@ -1,10 +1,62 @@
 package club.itstudio.itmanager.service.impl
 
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
 import club.itstudio.itmanager.entity.dto.Attachment
 import club.itstudio.itmanager.mapper.AttachmentMapper
 import club.itstudio.itmanager.service.AttachmentService
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+import reactor.core.scheduler.Schedulers
+import java.util.NoSuchElementException
 
 @Service
-class AttachmentServiceImpl : ServiceImpl<AttachmentMapper, Attachment>(), AttachmentService
+class AttachmentServiceImpl : ServiceImpl<AttachmentMapper, Attachment>(), AttachmentService {
+
+    private val logger = LoggerFactory.getLogger(this::class.java)
+
+    private fun <T : Any> blockingCall(block: () -> T?): Mono<T> =
+        Mono.fromCallable(block).subscribeOn(Schedulers.boundedElastic())
+
+    override fun getAttachmentById(id: Long): Mono<Attachment> =
+        blockingCall {
+            logger.info("Searching attachment by id")
+            ktQuery().eq(Attachment::id, id).one()
+        }.switchIfEmpty(Mono.error(NoSuchElementException("Attachment not found")))
+
+    override fun listByRelated(relatedTable: String, relatedId: Long): Mono<List<Attachment>> =
+        blockingCall {
+            logger.info("Searching attachments by related table and id")
+            ktQuery().eq(Attachment::relatedTable, relatedTable).eq(Attachment::relatedId, relatedId).list()
+        }
+
+    override fun listByUploader(uploadedBy: Long): Mono<List<Attachment>> =
+        blockingCall {
+            logger.info("Searching attachments by uploader")
+            ktQuery().eq(Attachment::uploadedBy, uploadedBy).list()
+        }
+
+    override fun createAttachment(attachment: Attachment): Mono<Boolean> =
+        blockingCall {
+            logger.info("Creating attachment")
+            save(attachment)
+        }
+
+    override fun deleteAttachment(id: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting attachment by id")
+            removeById(id)
+        }
+
+    override fun deleteByRelated(relatedTable: String, relatedId: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting attachments by related table and id")
+            remove(ktQuery().eq(Attachment::relatedTable, relatedTable).eq(Attachment::relatedId, relatedId))
+        }
+
+    override fun exportAllAttachments(): Mono<List<Attachment>> =
+        blockingCall {
+            logger.info("Exporting all attachments")
+            list()
+        }
+}
diff --git a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/BorrowRecordServiceImpl.kt b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/BorrowRecordServiceImpl.kt
index 4abc50f..3dc6e3f 100644
--- a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/BorrowRecordServiceImpl.kt
+++ b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/BorrowRecordServiceImpl.kt
@@ -1,10 +1,74 @@
 package club.itstudio.itmanager.service.impl
 
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
 import club.itstudio.itmanager.entity.dto.BorrowRecord
 import club.itstudio.itmanager.mapper.BorrowRecordMapper
 import club.itstudio.itmanager.service.BorrowRecordService
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+import reactor.core.scheduler.Schedulers
+import java.util.NoSuchElementException
 
 @Service
-class BorrowRecordServiceImpl : ServiceImpl<BorrowRecordMapper, BorrowRecord>(), BorrowRecordService
+class BorrowRecordServiceImpl : ServiceImpl<BorrowRecordMapper, BorrowRecord>(), BorrowRecordService {
+
+    private val logger = LoggerFactory.getLogger(this::class.java)
+
+    private fun <T : Any> blockingCall(block: () -> T?): Mono<T> =
+        Mono.fromCallable(block).subscribeOn(Schedulers.boundedElastic())
+
+    override fun getBorrowRecordById(id: Long): Mono<BorrowRecord> =
+        blockingCall {
+            logger.info("Searching borrow record by id")
+            ktQuery().eq(BorrowRecord::id, id).one()
+        }.switchIfEmpty(Mono.error(NoSuchElementException("BorrowRecord not found")))
+
+    override fun listByItem(itemId: Long): Mono<List<BorrowRecord>> =
+        blockingCall {
+            logger.info("Searching borrow records by item id")
+            ktQuery().eq(BorrowRecord::itemId, itemId).list()
+        }
+
+    override fun listByBorrower(borrowerId: Long): Mono<List<BorrowRecord>> =
+        blockingCall {
+            logger.info("Searching borrow records by borrower id")
+            ktQuery().eq(BorrowRecord::borrowerId, borrowerId).list()
+        }
+
+    override fun listByStatus(status: String): Mono<List<BorrowRecord>> =
+        blockingCall {
+            logger.info("Searching borrow records by status")
+            ktQuery().eq(BorrowRecord::status, status).list()
+        }
+
+    override fun listOverdueRecords(): Mono<List<BorrowRecord>> =
+        blockingCall {
+            logger.info("Searching overdue borrow records")
+            ktQuery().eq(BorrowRecord::status, "OVERDUE").list()
+        }
+
+    override fun createBorrowRecord(record: BorrowRecord): Mono<Boolean> =
+        blockingCall {
+            logger.info("Creating borrow record")
+            save(record)
+        }
+
+    override fun updateBorrowRecord(record: BorrowRecord): Mono<Boolean> =
+        blockingCall {
+            logger.info("Updating borrow record")
+            updateById(record)
+        }
+
+    override fun deleteBorrowRecord(id: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting borrow record by id")
+            removeById(id)
+        }
+
+    override fun exportAllBorrowRecords(): Mono<List<BorrowRecord>> =
+        blockingCall {
+            logger.info("Exporting all borrow records")
+            list()
+        }
+}
diff --git a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/CategoryServiceImpl.kt b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/CategoryServiceImpl.kt
index a51ec41..841bb9c 100644
--- a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/CategoryServiceImpl.kt
+++ b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/CategoryServiceImpl.kt
@@ -1,10 +1,62 @@
 package club.itstudio.itmanager.service.impl
 
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
 import club.itstudio.itmanager.entity.dto.Category
 import club.itstudio.itmanager.mapper.CategoryMapper
 import club.itstudio.itmanager.service.CategoryService
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+import reactor.core.scheduler.Schedulers
+import java.util.NoSuchElementException
 
 @Service
-class CategoryServiceImpl : ServiceImpl<CategoryMapper, Category>(), CategoryService
+class CategoryServiceImpl : ServiceImpl<CategoryMapper, Category>(), CategoryService {
+
+    private val logger = LoggerFactory.getLogger(this::class.java)
+
+    private fun <T : Any> blockingCall(block: () -> T?): Mono<T> =
+        Mono.fromCallable(block).subscribeOn(Schedulers.boundedElastic())
+
+    override fun getCategoryById(id: Long): Mono<Category> =
+        blockingCall {
+            logger.info("Searching category by id")
+            ktQuery().eq(Category::id, id).one()
+        }.switchIfEmpty(Mono.error(NoSuchElementException("Category not found")))
+
+    override fun listAllCategories(): Mono<List<Category>> =
+        blockingCall {
+            logger.info("Listing all categories")
+            list()
+        }
+
+    override fun listByParentId(parentId: Long): Mono<List<Category>> =
+        blockingCall {
+            logger.info("Searching categories by parent id")
+            ktQuery().eq(Category::parentId, parentId).list()
+        }
+
+    override fun createCategory(category: Category): Mono<Boolean> =
+        blockingCall {
+            logger.info("Creating category")
+            save(category)
+        }
+
+    override fun updateCategory(category: Category): Mono<Boolean> =
+        blockingCall {
+            logger.info("Updating category")
+            updateById(category)
+        }
+
+    override fun deleteCategory(id: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting category by id")
+            removeById(id)
+        }
+
+    override fun exportAllCategories(): Mono<List<Category>> =
+        blockingCall {
+            logger.info("Exporting all categories")
+            list()
+        }
+}
diff --git a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/DepartmentServiceImpl.kt b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/DepartmentServiceImpl.kt
index 126be72..d74adb8 100644
--- a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/DepartmentServiceImpl.kt
+++ b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/DepartmentServiceImpl.kt
@@ -1,10 +1,62 @@
 package club.itstudio.itmanager.service.impl
 
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
 import club.itstudio.itmanager.entity.dto.Department
 import club.itstudio.itmanager.mapper.DepartmentMapper
 import club.itstudio.itmanager.service.DepartmentService
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+import reactor.core.scheduler.Schedulers
+import java.util.NoSuchElementException
 
 @Service
-class DepartmentServiceImpl : ServiceImpl<DepartmentMapper, Department>(), DepartmentService
+class DepartmentServiceImpl : ServiceImpl<DepartmentMapper, Department>(), DepartmentService {
+
+    private val logger = LoggerFactory.getLogger(this::class.java)
+
+    private fun <T : Any> blockingCall(block: () -> T?): Mono<T> =
+        Mono.fromCallable(block).subscribeOn(Schedulers.boundedElastic())
+
+    override fun getDepartmentById(id: Long): Mono<Department> =
+        blockingCall {
+            logger.info("Searching department by id")
+            ktQuery().eq(Department::id, id).one()
+        }.switchIfEmpty(Mono.error(NoSuchElementException("Department not found")))
+
+    override fun listAllDepartments(): Mono<List<Department>> =
+        blockingCall {
+            logger.info("Listing all departments")
+            list()
+        }
+
+    override fun listByParentId(parentId: Long): Mono<List<Department>> =
+        blockingCall {
+            logger.info("Searching departments by parent id")
+            ktQuery().eq(Department::parentId, parentId).list()
+        }
+
+    override fun createDepartment(department: Department): Mono<Boolean> =
+        blockingCall {
+            logger.info("Creating department")
+            save(department)
+        }
+
+    override fun updateDepartment(department: Department): Mono<Boolean> =
+        blockingCall {
+            logger.info("Updating department")
+            updateById(department)
+        }
+
+    override fun deleteDepartment(id: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting department by id")
+            removeById(id)
+        }
+
+    override fun exportAllDepartments(): Mono<List<Department>> =
+        blockingCall {
+            logger.info("Exporting all departments")
+            list()
+        }
+}
diff --git a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/EmailNoticeServiceImpl.kt b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/EmailNoticeServiceImpl.kt
index ece0c4d..a176e28 100644
--- a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/EmailNoticeServiceImpl.kt
+++ b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/EmailNoticeServiceImpl.kt
@@ -1,10 +1,72 @@
 package club.itstudio.itmanager.service.impl
 
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
 import club.itstudio.itmanager.entity.dto.EmailNotice
 import club.itstudio.itmanager.mapper.EmailNoticeMapper
 import club.itstudio.itmanager.service.EmailNoticeService
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+import reactor.core.scheduler.Schedulers
+import java.util.NoSuchElementException
 
 @Service
-class EmailNoticeServiceImpl : ServiceImpl<EmailNoticeMapper, EmailNotice>(), EmailNoticeService
+class EmailNoticeServiceImpl : ServiceImpl<EmailNoticeMapper, EmailNotice>(), EmailNoticeService {
+
+    private val logger = LoggerFactory.getLogger(this::class.java)
+
+    private fun <T : Any> blockingCall(block: () -> T?): Mono<T> =
+        Mono.fromCallable(block).subscribeOn(Schedulers.boundedElastic())
+
+    override fun getEmailNoticeById(id: Long): Mono<EmailNotice> =
+        blockingCall {
+            logger.info("Searching email notice by id")
+            ktQuery().eq(EmailNotice::id, id).one()
+        }.switchIfEmpty(Mono.error(NoSuchElementException("EmailNotice not found")))
+
+    override fun listAllNotices(): Mono<List<EmailNotice>> =
+        blockingCall {
+            logger.info("Listing all email notices")
+            list()
+        }
+
+    override fun listEnabledNotices(): Mono<List<EmailNotice>> =
+        blockingCall {
+            logger.info("Listing enabled email notices")
+            ktQuery().eq(EmailNotice::enabled, true).list()
+        }
+
+    override fun createEmailNotice(notice: EmailNotice): Mono<Boolean> =
+        blockingCall {
+            logger.info("Creating email notice")
+            save(notice)
+        }
+
+    override fun updateEmailNotice(notice: EmailNotice): Mono<Boolean> =
+        blockingCall {
+            logger.info("Updating email notice")
+            updateById(notice)
+        }
+
+    override fun deleteEmailNotice(id: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting email notice by id")
+            removeById(id)
+        }
+
+    override fun toggleEnabled(id: Long): Mono<Boolean> =
+        blockingCall {
+            val notice = ktQuery().eq(EmailNotice::id, id).one()
+            if (notice != null) {
+                updateById(notice.copy(enabled = !notice.enabled))
+            } else {
+                false
+            }
+        }
+
+    override fun exportAllEmailNotices(): Mono<List<EmailNotice>> =
+        blockingCall {
+            logger.info("Exporting all email notices")
+            list()
+        }
+}
diff --git a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/EvaluationServiceImpl.kt b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/EvaluationServiceImpl.kt
index f10ab88..bed43a4 100644
--- a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/EvaluationServiceImpl.kt
+++ b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/EvaluationServiceImpl.kt
@@ -1,10 +1,74 @@
 package club.itstudio.itmanager.service.impl
 
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
 import club.itstudio.itmanager.entity.dto.Evaluation
 import club.itstudio.itmanager.mapper.EvaluationMapper
 import club.itstudio.itmanager.service.EvaluationService
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+import reactor.core.scheduler.Schedulers
+import java.util.NoSuchElementException
 
 @Service
-class EvaluationServiceImpl : ServiceImpl<EvaluationMapper, Evaluation>(), EvaluationService
+class EvaluationServiceImpl : ServiceImpl<EvaluationMapper, Evaluation>(), EvaluationService {
+
+    private val logger = LoggerFactory.getLogger(this::class.java)
+
+    private fun <T : Any> blockingCall(block: () -> T?): Mono<T> =
+        Mono.fromCallable(block).subscribeOn(Schedulers.boundedElastic())
+
+    override fun getEvaluationById(id: Long): Mono<Evaluation> =
+        blockingCall {
+            logger.info("Searching evaluation by id")
+            ktQuery().eq(Evaluation::id, id).one()
+        }.switchIfEmpty(Mono.error(NoSuchElementException("Evaluation not found")))
+
+    override fun listByEvaluator(evaluatorId: Long): Mono<List<Evaluation>> =
+        blockingCall {
+            logger.info("Searching evaluations by evaluator id")
+            ktQuery().eq(Evaluation::evaluatorId, evaluatorId).list()
+        }
+
+    override fun listByRelatedItem(itemId: Long): Mono<List<Evaluation>> =
+        blockingCall {
+            logger.info("Searching evaluations by related item id")
+            ktQuery().eq(Evaluation::relatedItemId, itemId).list()
+        }
+
+    override fun listByScore(score: Short): Mono<List<Evaluation>> =
+        blockingCall {
+            logger.info("Searching evaluations by score")
+            ktQuery().eq(Evaluation::score, score).list()
+        }
+
+    override fun createEvaluation(evaluation: Evaluation): Mono<Boolean> =
+        blockingCall {
+            logger.info("Creating evaluation")
+            save(evaluation)
+        }
+
+    override fun updateEvaluation(evaluation: Evaluation): Mono<Boolean> =
+        blockingCall {
+            logger.info("Updating evaluation")
+            updateById(evaluation)
+        }
+
+    override fun deleteEvaluation(id: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting evaluation by id")
+            removeById(id)
+        }
+
+    override fun deleteByEvaluator(evaluatorId: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting evaluations by evaluator id")
+            remove(ktQuery().eq(Evaluation::evaluatorId, evaluatorId))
+        }
+
+    override fun exportAllEvaluations(): Mono<List<Evaluation>> =
+        blockingCall {
+            logger.info("Exporting all evaluations")
+            list()
+        }
+}
diff --git a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/FinanceRecordServiceImpl.kt b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/FinanceRecordServiceImpl.kt
index 6a4e154..438e3d7 100644
--- a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/FinanceRecordServiceImpl.kt
+++ b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/FinanceRecordServiceImpl.kt
@@ -1,10 +1,74 @@
 package club.itstudio.itmanager.service.impl
 
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
 import club.itstudio.itmanager.entity.dto.FinanceRecord
 import club.itstudio.itmanager.mapper.FinanceRecordMapper
 import club.itstudio.itmanager.service.FinanceRecordService
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+import reactor.core.scheduler.Schedulers
+import java.util.NoSuchElementException
 
 @Service
-class FinanceRecordServiceImpl : ServiceImpl<FinanceRecordMapper, FinanceRecord>(), FinanceRecordService
+class FinanceRecordServiceImpl : ServiceImpl<FinanceRecordMapper, FinanceRecord>(), FinanceRecordService {
+
+    private val logger = LoggerFactory.getLogger(this::class.java)
+
+    private fun <T : Any> blockingCall(block: () -> T?): Mono<T> =
+        Mono.fromCallable(block).subscribeOn(Schedulers.boundedElastic())
+
+    override fun getFinanceRecordById(id: Long): Mono<FinanceRecord> =
+        blockingCall {
+            logger.info("Searching finance record by id")
+            ktQuery().eq(FinanceRecord::id, id).one()
+        }.switchIfEmpty(Mono.error(NoSuchElementException("FinanceRecord not found")))
+
+    override fun listByType(type: String): Mono<List<FinanceRecord>> =
+        blockingCall {
+            logger.info("Searching finance records by type")
+            ktQuery().eq(FinanceRecord::type, type).list()
+        }
+
+    override fun listByDateRange(start: String, end: String): Mono<List<FinanceRecord>> =
+        blockingCall {
+            logger.info("Searching finance records by date range")
+            ktQuery().apply("occurred_at BETWEEN {0} AND {1}", start, end).list()
+        }
+
+    override fun listByVendor(vendor: String): Mono<List<FinanceRecord>> =
+        blockingCall {
+            logger.info("Searching finance records by vendor")
+            ktQuery().eq(FinanceRecord::vendor, vendor).list()
+        }
+
+    override fun listByRelatedItem(itemId: Long): Mono<List<FinanceRecord>> =
+        blockingCall {
+            logger.info("Searching finance records by related item id")
+            ktQuery().eq(FinanceRecord::relatedItemId, itemId).list()
+        }
+
+    override fun createFinanceRecord(record: FinanceRecord): Mono<Boolean> =
+        blockingCall {
+            logger.info("Creating finance record")
+            save(record)
+        }
+
+    override fun updateFinanceRecord(record: FinanceRecord): Mono<Boolean> =
+        blockingCall {
+            logger.info("Updating finance record")
+            updateById(record)
+        }
+
+    override fun deleteFinanceRecord(id: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting finance record by id")
+            removeById(id)
+        }
+
+    override fun exportAllFinanceRecords(): Mono<List<FinanceRecord>> =
+        blockingCall {
+            logger.info("Exporting all finance records")
+            list()
+        }
+}
diff --git a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/ItemServiceImpl.kt b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/ItemServiceImpl.kt
index 1b0243c..7d73c58 100644
--- a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/ItemServiceImpl.kt
+++ b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/ItemServiceImpl.kt
@@ -1,10 +1,123 @@
 package club.itstudio.itmanager.service.impl
 
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
 import club.itstudio.itmanager.entity.dto.Item
 import club.itstudio.itmanager.mapper.ItemMapper
 import club.itstudio.itmanager.service.ItemService
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+import reactor.core.scheduler.Schedulers
+import java.util.NoSuchElementException
 
 @Service
-class ItemServiceImpl : ServiceImpl<ItemMapper, Item>(), ItemService
+class ItemServiceImpl : ServiceImpl<ItemMapper, Item>(), ItemService {
+
+    private val logger = LoggerFactory.getLogger(this::class.java)
+
+    private fun <T : Any> blockingCall(block: () -> T?): Mono<T> =
+        Mono.fromCallable(block).subscribeOn(Schedulers.boundedElastic())
+
+    override fun pageItems(page: Page<Item>, keyword: String?, status: String?): Mono<Page<Item>> =
+        blockingCall {
+            logger.info("Paging items with keyword and status")
+            val wrapper = ktQuery()
+            if (!keyword.isNullOrBlank()) {
+                wrapper.and {
+                    it.like(Item::name, keyword).or().like(Item::code, keyword)
+                }
+            }
+            if (!status.isNullOrBlank()) {
+                wrapper.eq(Item::status, status)
+            }
+            page(page, wrapper)
+        }
+
+    override fun getItemById(id: Long): Mono<Item> =
+        blockingCall {
+            logger.info("Searching item by id")
+            ktQuery().eq(Item::id, id).one()
+        }.switchIfEmpty(Mono.error(NoSuchElementException("Item not found")))
+
+    override fun listAvailableItems(): Mono<List<Item>> =
+        blockingCall {
+            logger.info("Listing available items")
+            ktQuery().gt(Item::availableQuantity, 0).eq(Item::status, "normal").list()
+        }
+
+    override fun listInUseItems(): Mono<List<Item>> =
+        blockingCall {
+            logger.info("Listing in-use items")
+            ktQuery().apply("total_quantity - available_quantity > 0").list()
+        }
+
+    override fun listItemsByCategory(categoryId: Long): Mono<List<Item>> =
+        blockingCall {
+            logger.info("Listing items by category")
+            ktQuery().eq(Item::categoryId, categoryId).list()
+        }
+
+    override fun createItem(item: Item): Mono<Boolean> =
+        blockingCall {
+            logger.info("Creating item")
+            save(item)
+        }
+
+    override fun updateItem(item: Item): Mono<Boolean> =
+        blockingCall {
+            logger.info("Updating item")
+            updateById(item)
+        }
+
+    override fun removeItemById(id: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Removing item by id")
+            removeById(id)
+        }
+
+    override fun setPrimaryImage(id: Long, imagePath: String): Mono<Boolean> =
+        blockingCall {
+            logger.info("Setting primary image for item")
+            ktUpdate().eq(Item::id, id).set(Item::imagePath, imagePath).update()
+        }
+
+    override fun borrowItem(id: Long, quantity: Int): Mono<Boolean> =
+        blockingCall {
+            val item = ktQuery().eq(Item::id, id).one()
+            if (item != null && item.availableQuantity >= quantity) {
+                ktUpdate().eq(Item::id, id).set(Item::availableQuantity, item.availableQuantity - quantity).update()
+            } else {
+                false
+            }
+        }
+
+    override fun returnItem(id: Long, quantity: Int): Mono<Boolean> =
+        blockingCall {
+            val item = ktQuery().eq(Item::id, id).one()
+            if (item != null && item.totalQuantity >= item.availableQuantity + quantity) {
+                ktUpdate().eq(Item::id, id).set(Item::availableQuantity, item.availableQuantity + quantity).update()
+            } else {
+                false
+            }
+        }
+
+    override fun batchInsertItems(items: List<Item>): Mono<Boolean> =
+        blockingCall {
+            logger.info("Batch inserting items")
+            saveBatch(items)
+        }
+
+    override fun replaceAllItems(items: List<Item>): Mono<Boolean> =
+        blockingCall {
+            logger.info("Replacing all items")
+            remove(ktQuery())
+            saveBatch(items)
+        }
+
+    override fun exportAllItems(): Mono<List<Item>> =
+        blockingCall {
+            logger.info("Exporting all items")
+            list()
+        }
+}
diff --git a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/ItemTransactionServiceImpl.kt b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/ItemTransactionServiceImpl.kt
index 59b1030..b5447a5 100644
--- a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/ItemTransactionServiceImpl.kt
+++ b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/ItemTransactionServiceImpl.kt
@@ -1,10 +1,68 @@
 package club.itstudio.itmanager.service.impl
 
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
 import club.itstudio.itmanager.entity.dto.ItemTransaction
 import club.itstudio.itmanager.mapper.ItemTransactionMapper
 import club.itstudio.itmanager.service.ItemTransactionService
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+import reactor.core.scheduler.Schedulers
+import java.util.NoSuchElementException
 
 @Service
-class ItemTransactionServiceImpl : ServiceImpl<ItemTransactionMapper, ItemTransaction>(), ItemTransactionService
+class ItemTransactionServiceImpl : ServiceImpl<ItemTransactionMapper, ItemTransaction>(), ItemTransactionService {
+
+    private val logger = LoggerFactory.getLogger(this::class.java)
+
+    private fun <T : Any> blockingCall(block: () -> T?): Mono<T> =
+        Mono.fromCallable(block).subscribeOn(Schedulers.boundedElastic())
+
+    override fun getTransactionById(id: Long): Mono<ItemTransaction> =
+        blockingCall {
+            logger.info("Searching transaction by id")
+            ktQuery().eq(ItemTransaction::id, id).one()
+        }.switchIfEmpty(Mono.error(NoSuchElementException("ItemTransaction not found")))
+
+    override fun listByItem(itemId: Long): Mono<List<ItemTransaction>> =
+        blockingCall {
+            logger.info("Searching transactions by item id")
+            ktQuery().eq(ItemTransaction::itemId, itemId).list()
+        }
+
+    override fun listByType(transType: String): Mono<List<ItemTransaction>> =
+        blockingCall {
+            logger.info("Searching transactions by type")
+            ktQuery().eq(ItemTransaction::transType, transType).list()
+        }
+
+    override fun listByOperator(operatorId: Long): Mono<List<ItemTransaction>> =
+        blockingCall {
+            logger.info("Searching transactions by operator id")
+            ktQuery().eq(ItemTransaction::operatorId, operatorId).list()
+        }
+
+    override fun createTransaction(transaction: ItemTransaction): Mono<Boolean> =
+        blockingCall {
+            logger.info("Creating transaction")
+            save(transaction)
+        }
+
+    override fun updateTransaction(transaction: ItemTransaction): Mono<Boolean> =
+        blockingCall {
+            logger.info("Updating transaction")
+            updateById(transaction)
+        }
+
+    override fun deleteTransaction(id: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting transaction by id")
+            removeById(id)
+        }
+
+    override fun exportAllTransactions(): Mono<List<ItemTransaction>> =
+        blockingCall {
+            logger.info("Exporting all transactions")
+            list()
+        }
+}
diff --git a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/MemoServiceImpl.kt b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/MemoServiceImpl.kt
index b241a85..2045119 100644
--- a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/MemoServiceImpl.kt
+++ b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/MemoServiceImpl.kt
@@ -1,10 +1,80 @@
 package club.itstudio.itmanager.service.impl
 
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
 import club.itstudio.itmanager.entity.dto.Memo
 import club.itstudio.itmanager.mapper.MemoMapper
 import club.itstudio.itmanager.service.MemoService
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+import reactor.core.scheduler.Schedulers
+import java.util.NoSuchElementException
 
 @Service
-class MemoServiceImpl : ServiceImpl<MemoMapper, Memo>(), MemoService
+class MemoServiceImpl : ServiceImpl<MemoMapper, Memo>(), MemoService {
+
+    private val logger = LoggerFactory.getLogger(this::class.java)
+
+    private fun <T : Any> blockingCall(block: () -> T?): Mono<T> =
+        Mono.fromCallable(block).subscribeOn(Schedulers.boundedElastic())
+
+    override fun getMemoById(id: Long): Mono<Memo> =
+        blockingCall {
+            logger.info("Searching memo by id")
+            ktQuery().eq(Memo::id, id).one()
+        }.switchIfEmpty(Mono.error(NoSuchElementException("Memo not found")))
+
+    override fun searchMemos(keyword: String?): Mono<List<Memo>> =
+        blockingCall {
+            logger.info("Searching memos with keyword")
+            if (keyword.isNullOrBlank()) {
+                list()
+            } else {
+                ktQuery().and {
+                    it.like(Memo::title, keyword).or().like(Memo::content, keyword)
+                }.list()
+            }
+        }
+
+    override fun listByAuthor(authorId: Long): Mono<List<Memo>> =
+        blockingCall {
+            logger.info("Searching memos by author id")
+            ktQuery().eq(Memo::authorId, authorId).list()
+        }
+
+    override fun listByRelatedItem(itemId: Long): Mono<List<Memo>> =
+        blockingCall {
+            logger.info("Searching memos by related item id")
+            ktQuery().eq(Memo::relatedItemId, itemId).list()
+        }
+
+    override fun listPublicMemos(): Mono<List<Memo>> =
+        blockingCall {
+            logger.info("Listing public memos")
+            ktQuery().eq(Memo::isPublic, true).list()
+        }
+
+    override fun createMemo(memo: Memo): Mono<Boolean> =
+        blockingCall {
+            logger.info("Creating memo")
+            save(memo)
+        }
+
+    override fun updateMemo(memo: Memo): Mono<Boolean> =
+        blockingCall {
+            logger.info("Updating memo")
+            updateById(memo)
+        }
+
+    override fun deleteMemo(id: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting memo by id")
+            removeById(id)
+        }
+
+    override fun exportAllMemos(): Mono<List<Memo>> =
+        blockingCall {
+            logger.info("Exporting all memos")
+            list()
+        }
+}
diff --git a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/PersonnelServiceImpl.kt b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/PersonnelServiceImpl.kt
index 501e7f2..ff1463f 100644
--- a/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/PersonnelServiceImpl.kt
+++ b/src/beckend/src/main/kotlin/club/itstudio/itmanager/service/impl/PersonnelServiceImpl.kt
@@ -1,10 +1,83 @@
 package club.itstudio.itmanager.service.impl
 
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
 import club.itstudio.itmanager.entity.dto.Personnel
 import club.itstudio.itmanager.mapper.PersonnelMapper
 import club.itstudio.itmanager.service.PersonnelService
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+import reactor.core.scheduler.Schedulers
+import java.util.NoSuchElementException
 
 @Service
-class PersonnelServiceImpl : ServiceImpl<PersonnelMapper, Personnel>(), PersonnelService
+class PersonnelServiceImpl : ServiceImpl<PersonnelMapper, Personnel>(), PersonnelService {
+
+    private val logger = LoggerFactory.getLogger(this::class.java)
+
+    private fun <T : Any> blockingCall(block: () -> T?): Mono<T> =
+        Mono.fromCallable(block).subscribeOn(Schedulers.boundedElastic())
+
+    override fun getPersonnelById(id: Long): Mono<Personnel> =
+        blockingCall {
+            logger.info("Searching personnel by id")
+            ktQuery().eq(Personnel::id, id).one()
+        }.switchIfEmpty(Mono.error(NoSuchElementException("Personnel not found")))
+
+    override fun searchPersonnel(keyword: String?): Mono<List<Personnel>> =
+        blockingCall {
+            logger.info("Searching personnel with keyword")
+            if (keyword.isNullOrBlank()) {
+                list()
+            } else {
+                ktQuery().and {
+                    it.like(Personnel::name, keyword)
+                        .or().like(Personnel::employeeNo, keyword)
+                        .or().like(Personnel::phone, keyword)
+                        .or().like(Personnel::email, keyword)
+                }.list()
+            }
+        }
+
+    override fun listByDepartment(departmentId: Long): Mono<List<Personnel>> =
+        blockingCall {
+            logger.info("Searching personnel by department id")
+            ktQuery().eq(Personnel::departmentId, departmentId).list()
+        }
+
+    override fun listByRole(role: String): Mono<List<Personnel>> =
+        blockingCall {
+            logger.info("Searching personnel by role")
+            ktQuery().eq(Personnel::role, role).list()
+        }
+
+    override fun createPersonnel(personnel: Personnel): Mono<Boolean> =
+        blockingCall {
+            logger.info("Creating personnel")
+            save(personnel)
+        }
+
+    override fun updatePersonnel(personnel: Personnel): Mono<Boolean> =
+        blockingCall {
+            logger.info("Updating personnel")
+            updateById(personnel)
+        }
+
+    override fun deletePersonnel(id: Long): Mono<Boolean> =
+        blockingCall {
+            logger.info("Deleting personnel by id")
+            removeById(id)
+        }
+
+    override fun setActive(id: Long, active: Boolean): Mono<Boolean> =
+        blockingCall {
+            logger.info("Setting personnel active status")
+            ktUpdate().eq(Personnel::id, id).set(Personnel::isActive, active).update()
+        }
+
+    override fun exportAllPersonnel(): Mono<List<Personnel>> =
+        blockingCall {
+            logger.info("Exporting all personnel")
+            list()
+        }
+}