diff --git a/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/BaseSvc.kt b/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/BaseSvc.kt
index d42894d..8679bea 100644
--- a/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/BaseSvc.kt
+++ b/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/BaseSvc.kt
@@ -23,7 +23,7 @@ import kotlin.concurrent.timer
 import kotlin.coroutines.resume
 import kotlin.coroutines.suspendCoroutine
 
-abstract class BaseSvc {
+internal abstract class BaseSvc {
     companion object {
         val currentUin: String
             get() = app.currentAccountUin
diff --git a/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/CardSvc.kt b/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/CardSvc.kt
index acd74f1..c2f9d44 100644
--- a/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/CardSvc.kt
+++ b/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/CardSvc.kt
@@ -27,8 +27,12 @@ import tencent.im.oidb.oidb_sso
 import kotlin.coroutines.resume
 
 internal object CardSvc: BaseSvc() {
-    private val GetModelShowLock = Mutex()
-    private val refreshCardLock = Mutex()
+    private val GetModelShowLock by lazy {
+        Mutex()
+    }
+    private val refreshCardLock by lazy {
+        Mutex()
+    }
 
     suspend fun getModelShow(uin: Long = app.longAccountUin): String {
         return GetModelShowLock.withLock {
diff --git a/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/FileSvc.kt b/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/FileSvc.kt
index e023fcd..b2bb214 100644
--- a/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/FileSvc.kt
+++ b/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/FileSvc.kt
@@ -11,7 +11,6 @@ import tencent.im.oidb.cmd0x6d8.oidb_0x6d8
 import tencent.im.oidb.oidb_sso
 
 internal object FileSvc: BaseSvc() {
-
     fun createFileFolder(groupId: String, folderName: String) {
         sendOidb("OidbSvc.0x6d7_0", 1751, 0, protobufOf(
             1 to mapOf(
diff --git a/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/FriendSvc.kt b/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/FriendSvc.kt
index 73daad5..eba1f6c 100644
--- a/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/FriendSvc.kt
+++ b/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/FriendSvc.kt
@@ -1,8 +1,10 @@
+@file:OptIn(DelicateCoroutinesApi::class)
 package moe.fuqiuluo.qqinterface.servlet
 
 import com.tencent.mobileqq.data.Friends
 import com.tencent.mobileqq.friend.api.IFriendDataService
 import com.tencent.mobileqq.friend.api.IFriendHandlerService
+import kotlinx.coroutines.DelicateCoroutinesApi
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
diff --git a/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/GroupSvc.kt b/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/GroupSvc.kt
index 2393c3d..6089d47 100644
--- a/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/GroupSvc.kt
+++ b/xposed/src/main/java/moe/fuqiuluo/qqinterface/servlet/GroupSvc.kt
@@ -38,8 +38,12 @@ import java.nio.ByteBuffer
 import kotlin.coroutines.resume
 
 internal object GroupSvc: BaseSvc() {
-    private val RefreshTroopMemberInfoLock = Mutex()
-    private val RefreshTroopMemberListLock = Mutex()
+    private val RefreshTroopMemberInfoLock by lazy {
+        Mutex()
+    }
+    private val RefreshTroopMemberListLock by lazy {
+        Mutex()
+    }
 
     private lateinit var METHOD_REQ_MEMBER_INFO: Method
     private lateinit var METHOD_REQ_MEMBER_INFO_V2: Method
diff --git a/xposed/src/main/java/moe/fuqiuluo/shamrock/helper/ContactHelper.kt b/xposed/src/main/java/moe/fuqiuluo/shamrock/helper/ContactHelper.kt
index 3218302..8bab209 100644
--- a/xposed/src/main/java/moe/fuqiuluo/shamrock/helper/ContactHelper.kt
+++ b/xposed/src/main/java/moe/fuqiuluo/shamrock/helper/ContactHelper.kt
@@ -4,7 +4,6 @@ import com.tencent.qqnt.kernel.nativeinterface.MsgConstant
 import kotlinx.coroutines.suspendCancellableCoroutine
 import moe.fuqiuluo.qqinterface.servlet.FriendSvc
 import moe.fuqiuluo.qqinterface.servlet.GroupSvc
-import moe.fuqiuluo.qqinterface.servlet.MsgSvc
 import moe.fuqiuluo.shamrock.xposed.helper.NTServiceFetcher
 import kotlin.coroutines.resume
 
diff --git a/xposed/src/main/java/moe/fuqiuluo/shamrock/xposed/helper/NTServiceFetcher.kt b/xposed/src/main/java/moe/fuqiuluo/shamrock/xposed/helper/NTServiceFetcher.kt
index 96c2bd7..04e6259 100644
--- a/xposed/src/main/java/moe/fuqiuluo/shamrock/xposed/helper/NTServiceFetcher.kt
+++ b/xposed/src/main/java/moe/fuqiuluo/shamrock/xposed/helper/NTServiceFetcher.kt
@@ -73,8 +73,8 @@ internal object NTServiceFetcher {
             LogCenter.log("Register MSG listener successfully.")
             msgService.addMsgListener(AioListener)
 
-            groupService.addKernelGroupListener(GroupEventListener)
-            LogCenter.log("Register Group listener successfully.")
+            //groupService.addKernelGroupListener(GroupEventListener)
+            //LogCenter.log("Register Group listener successfully.")
 
             PrimitiveListener.registerListener()
         } catch (e: Throwable) {