diff --git a/src/main/kotlin/net/taehui/twilight/JSON.kt b/src/main/kotlin/net/taehui/twilight/JSON.kt
index d31b4ec..8582c43 100644
--- a/src/main/kotlin/net/taehui/twilight/JSON.kt
+++ b/src/main/kotlin/net/taehui/twilight/JSON.kt
@@ -632,24 +632,13 @@
     }
 
     class TwilightWwwAvatarAbility(rs: ResultSet, rate: Double, val handled: Component.Handled) {
-        val noteID: String
-        val artist: String
-        val title: String
-        val genre: String
-        val levelText: String
-        val level: Int
-        val stand: Int
-        val ability: Double
-
-        init {
-            noteID = rs.getString("Note_ID")
-            artist = rs.getString("Artist")
-            title = rs.getString("Title")
-            genre = rs.getString("Genre")
-            levelText = rs.getString("Level_Text")
-            level = rs.getInt("Level")
-            stand = rs.getInt("Stand")
-            ability = rs.getDouble("Value") * rate
-        }
+        val noteID: String = rs.getString("Note_ID")
+        val artist: String = rs.getString("Artist")
+        val title: String = rs.getString("Title")
+        val genre: String = rs.getString("Genre")
+        val levelText: String = rs.getString("Level_Text")
+        val level: Int = rs.getInt("Level")
+        val stand: Int = rs.getInt("Stand")
+        val ability: Double = rs.getDouble("Value") * rate
     }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/net/taehui/twilight/system/DB.kt b/src/main/kotlin/net/taehui/twilight/system/DB.kt
index cf3bf88..e936d3f 100644
--- a/src/main/kotlin/net/taehui/twilight/system/DB.kt
+++ b/src/main/kotlin/net/taehui/twilight/system/DB.kt
@@ -1060,7 +1060,7 @@
                         var commentPlace = -1
                         val commentsMe = mutableListOf<ICommentary>()
                         comments.forEachIndexed { i, comment ->
-                            val isMe = comment.avatarID == avatarID;
+                            val isMe = comment.avatarID == avatarID
                             if (viewUnit == -1 || commentsMe.size < viewUnit || isMe) {
                                 commentsMe.add(comment)
                                 if (isMe) {
diff --git a/src/main/kotlin/net/taehui/twilight/system/SiteHandler.kt b/src/main/kotlin/net/taehui/twilight/system/SiteHandler.kt
index 0d0c861..f677a42 100644
--- a/src/main/kotlin/net/taehui/twilight/system/SiteHandler.kt
+++ b/src/main/kotlin/net/taehui/twilight/system/SiteHandler.kt
@@ -18,7 +18,7 @@
     val commentSiteID: UUID = UUID.fromString("00000000-0000-0000-0000-000000000000")
     val defaultSiteID: UUID = UUID.fromString("00000000-0000-0000-0000-000000000001")
     val platformSiteID: UUID = UUID.fromString("00000000-0000-0000-0000-000000000002")
-    val toNotifySiteID: UUID = UUID.fromString("00000000-0000-0000-0000-000000000003")
+    private val toNotifySiteID: UUID = UUID.fromString("00000000-0000-0000-0000-000000000003")
 
     init {
         val defaultSite = Site(
diff --git a/src/main/kotlin/net/taehui/twilight/system/Translator.kt b/src/main/kotlin/net/taehui/twilight/system/Translator.kt
index ec7a973..0852830 100644
--- a/src/main/kotlin/net/taehui/twilight/system/Translator.kt
+++ b/src/main/kotlin/net/taehui/twilight/system/Translator.kt
@@ -10,11 +10,7 @@
 import org.apache.hc.client5.http.entity.UrlEncodedFormEntity
 import org.apache.hc.client5.http.impl.classic.BasicHttpClientResponseHandler
 import org.apache.hc.client5.http.impl.classic.HttpClients
-import org.apache.hc.core5.http.ContentType
-import org.apache.hc.core5.http.Header
-import org.apache.hc.core5.http.HttpHeaders
 import org.apache.hc.core5.http.message.BasicNameValuePair
-import org.apache.hc.core5.http.message.HeaderGroup
 import java.nio.charset.StandardCharsets
 import java.util.concurrent.CompletableFuture
 
diff --git a/src/main/kotlin/net/taehui/twilight/www/WwwAvatar.kt b/src/main/kotlin/net/taehui/twilight/www/WwwAvatar.kt
index d32bcb9..5c31ae2 100644
--- a/src/main/kotlin/net/taehui/twilight/www/WwwAvatar.kt
+++ b/src/main/kotlin/net/taehui/twilight/www/WwwAvatar.kt
@@ -1,7 +1,6 @@
 package net.taehui.twilight.www
 
 import com.fasterxml.jackson.databind.ObjectMapper
-import com.fasterxml.jackson.module.kotlin.readValue
 import io.netty.buffer.ByteBufUtil
 import io.netty.buffer.Unpooled
 import io.netty.channel.ChannelFutureListener