diff --git a/src/main/kotlin/io/github/sor2171/backend/Application.kt b/src/main/kotlin/io/github/sor2171/backend/Application.kt
index c45c36a..aee5788 100644
--- a/src/main/kotlin/io/github/sor2171/backend/Application.kt
+++ b/src/main/kotlin/io/github/sor2171/backend/Application.kt
@@ -53,12 +53,12 @@ fun Application.module() {
 
     // 4. Initialize JWT
     val jwtKey = environment.config.tryGetString("jwt.key")
-        ?: "2837452984690238475628394756203847562038475"
+        ?: "11111111111111111111111"
     val jwtExpireHours = environment.config.tryGetString("jwt.expire-hours")?.toIntOrNull() ?: 168
     val jwtUtils = JwtUtils(jwtKey, jwtExpireHours, redisService)
 
     // 5. Initialize Mail
-    val mailHost = environment.config.tryGetString("mail.host") ?: "smtp.qq.com"
+    val mailHost = environment.config.tryGetString("mail.host") ?: "smtp.xxx.com"
     val mailPort = environment.config.tryGetString("mail.port")?.toIntOrNull() ?: 465
     val mailUser = environment.config.tryGetString("mail.username") ?: ""
     val mailPass = environment.config.tryGetString("mail.password") ?: ""
diff --git a/src/main/kotlin/io/github/sor2171/backend/routes/TestRoutes.kt b/src/main/kotlin/io/github/sor2171/backend/routes/TestRoutes.kt
index 058d5bc..a5c893b 100644
--- a/src/main/kotlin/io/github/sor2171/backend/routes/TestRoutes.kt
+++ b/src/main/kotlin/io/github/sor2171/backend/routes/TestRoutes.kt
@@ -8,7 +8,7 @@ import io.ktor.server.routing.*
 fun Route.testRoutes(wsTokenService: WsTokenService) {
     route("/api/test") {
         get("/hello") {
-            call.respondText("Hello Kotlin WebFlux!")
+            call.respondText("Hello Kotlin Ktor!")
         }
 
         get("/wstoken") {
diff --git a/src/test/kotlin/ServerTest.kt b/src/test/kotlin/ServerTest.kt
index 21908c4..dd42404 100644
--- a/src/test/kotlin/ServerTest.kt
+++ b/src/test/kotlin/ServerTest.kt
@@ -1,23 +1,70 @@
-package io.github.sor2171
+package io.github.sor2171.backend
 
+import io.github.sor2171.backend.database.AccountRepository
+import io.github.sor2171.backend.database.DatabaseFactory
+import io.github.sor2171.backend.entity.dto.Account
+import io.github.sor2171.backend.utils.DateUtils
+import io.github.sor2171.backend.utils.PasswordEncoder
 import io.ktor.client.request.*
 import io.ktor.client.statement.*
 import io.ktor.http.*
+import io.ktor.server.config.*
 import io.ktor.server.response.*
 import io.ktor.server.routing.*
 import io.ktor.server.testing.*
+import kotlinx.coroutines.runBlocking
 import kotlin.test.*
 
 class ServerTest {
+
+    @Test
+    fun `test default user and password hash`() = runBlocking {
+        val rawPassword = "123456"
+        val encodedPassword = PasswordEncoder.encode(rawPassword)
+        println("==================================================================")
+        println("Default password '$rawPassword' BCrypt hash: $encodedPassword")
+        println("==================================================================")
+
+        try {
+            val config = ApplicationConfig("application.yaml")
+            DatabaseFactory.init(config)
+            val repository = AccountRepository()
+
+            val existingAccount = repository.findByName("test")
+            if (existingAccount == null) {
+                val newAccount = Account(
+                    id = null,
+                    username = "test",
+                    password = encodedPassword,
+                    email = "1234567890@gmail.com",
+                    role = "user",
+                    registerTime = DateUtils.getCurrentDateTime()
+                )
+                val newId = repository.save(newAccount)
+                println("Created default test user 'test' in database (ID: $newId).")
+            } else {
+                repository.resetPasswordByEmail(existingAccount.email, encodedPassword)
+                println("Existing test user 'test' found (ID: ${existingAccount.id}), updated password hash.")
+            }
+
+            val verifiedAccount = repository.findByName("test")
+            assertNotNull(verifiedAccount)
+            assertTrue(PasswordEncoder.matches(rawPassword, verifiedAccount.password))
+            println("Verification passed: user 'test' password successfully matched with BCrypt.")
+        } catch (e: Exception) {
+            println("Database check skipped or failed (check if MySQL is running): ${e.message}")
+        }
+    }
+
     @Test
     fun `test basic test route`() = testApplication {
         routing {
             get("/api/test/hello") {
-                call.respondText("Hello Kotlin WebFlux!")
+                call.respondText("Hello Kotlin Ktor!")
             }
         }
         val response = client.get("/api/test/hello")
         assertEquals(HttpStatusCode.OK, response.status)
-        assertEquals("Hello Kotlin WebFlux!", response.bodyAsText())
+        assertEquals("Hello Kotlin Ktor!", response.bodyAsText())
     }
 }