diff --git a/app/src/main/java/io/nekohasekai/sagernet/bg/BaseService.kt b/app/src/main/java/io/nekohasekai/sagernet/bg/BaseService.kt
index 89db97a..0ad3c7e 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/bg/BaseService.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/bg/BaseService.kt
@@ -156,7 +156,7 @@ class BaseService {
                     if (success) runOnDefaultDispatcher {
                         data.proxy!!.looper?.selectMain(ent.id)
                         data.binder.broadcast {
-                            it.stateChanged(-1, ent.displayName(), null)
+                            it.stateChanged(-1, ServiceNotification.genTitle(ent), null)
                         }
                     }
                 }
@@ -321,7 +321,7 @@ class BaseService {
             data.changeState(State.Connecting)
             runOnMainDispatcher {
                 try {
-                    data.notification = createNotification(profile.displayName())
+                    data.notification = createNotification(ServiceNotification.genTitle(profile))
 
                     Executable.killAll()    // clean up old processes
                     preInit()
diff --git a/app/src/main/java/io/nekohasekai/sagernet/bg/ServiceNotification.kt b/app/src/main/java/io/nekohasekai/sagernet/bg/ServiceNotification.kt
index cae6891..09af2b5 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/bg/ServiceNotification.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/bg/ServiceNotification.kt
@@ -17,6 +17,8 @@ import io.nekohasekai.sagernet.aidl.ISagerNetServiceCallback
 import io.nekohasekai.sagernet.aidl.SpeedDisplayData
 import io.nekohasekai.sagernet.aidl.TrafficData
 import io.nekohasekai.sagernet.database.DataStore
+import io.nekohasekai.sagernet.database.ProxyEntity
+import io.nekohasekai.sagernet.database.SagerDatabase
 import io.nekohasekai.sagernet.ktx.app
 import io.nekohasekai.sagernet.ktx.getColorAttr
 import io.nekohasekai.sagernet.ui.SwitchActivity
@@ -40,6 +42,12 @@ class ServiceNotification(
         const val notificationId = 1
         val flags =
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) PendingIntent.FLAG_IMMUTABLE else 0
+
+        fun genTitle(ent: ProxyEntity): String {
+            val gn = if (DataStore.showGroupInNotification)
+                SagerDatabase.groupDao.getById(ent.groupId)?.displayName() else null
+            return if (gn == null) ent.displayName() else "[$gn] ${ent.displayName()}"
+        }
     }
 
     val showDirectSpeed = DataStore.showDirectSpeed
diff --git a/app/src/main/java/io/nekohasekai/sagernet/bg/proto/TrafficLooper.kt b/app/src/main/java/io/nekohasekai/sagernet/bg/proto/TrafficLooper.kt
index ca59896..9e87988 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/bg/proto/TrafficLooper.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/bg/proto/TrafficLooper.kt
@@ -18,7 +18,7 @@ class TrafficLooper
 ) {
 
     private var job: Job? = null
-    private val items = mutableMapOf<Long, TrafficUpdater.TrafficLooperData>()
+    private val items = mutableMapOf<Long, TrafficUpdater.TrafficLooperData>() // associate ent id
 
     suspend fun stop() {
         job?.cancel()
@@ -50,7 +50,7 @@ class TrafficLooper
         job = sc.launch { loop() }
     }
 
-    var selectorNowId = -1L
+    var selectorNowId = -114514L
     var selectorNowFakeTag = ""
 
     fun selectMain(id: Long) {
@@ -111,6 +111,7 @@ class TrafficLooper
                 if (proxy.config.selectorGroupId >= 0L) {
                     itemMain = TrafficUpdater.TrafficLooperData(tag = TAG_PROXY)
                     itemMainBase = TrafficUpdater.TrafficLooperData(tag = TAG_PROXY)
+                    items[-2] = itemMain!!
                     selectMain(proxy.config.mainEntId)
                 }
                 //
@@ -136,9 +137,9 @@ class TrafficLooper
             // traffic
             val traffic = mutableMapOf<Long, TrafficData>()
             if (DataStore.profileTrafficStatistics) {
-                proxy.config.trafficMap.forEach { (tag, ents) ->
+                proxy.config.trafficMap.forEach { (_, ents) ->
                     for (ent in ents) {
-                        val item = items[ent.id] ?: return@forEach
+                        val item = items[ent.id] ?: continue
                         ent.rx = item.rx
                         ent.tx = item.tx
 //                    ProfileManager.updateProfile(ent) // update DB
diff --git a/app/src/main/java/io/nekohasekai/sagernet/bg/proto/TrafficUpdater.kt b/app/src/main/java/io/nekohasekai/sagernet/bg/proto/TrafficUpdater.kt
index 86468cb..ff35c79 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/bg/proto/TrafficUpdater.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/bg/proto/TrafficUpdater.kt
@@ -66,5 +66,7 @@ class TrafficUpdater(
                 item.txRate = diff.txRate
             }
         }
+//        Logs.d(JavaUtil.gson.toJson(items))
+//        Logs.d(JavaUtil.gson.toJson(updated))
     }
 }
diff --git a/app/src/main/java/io/nekohasekai/sagernet/database/DataStore.kt b/app/src/main/java/io/nekohasekai/sagernet/database/DataStore.kt
index 2b451a2..985f82d 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/database/DataStore.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/database/DataStore.kt
@@ -97,6 +97,7 @@ object DataStore : OnPreferenceDataStoreChangeListener {
 
     var allowAccess by configurationStore.boolean(Key.ALLOW_ACCESS)
     var speedInterval by configurationStore.stringToInt(Key.SPEED_INTERVAL)
+    var showGroupInNotification by configurationStore.boolean("showGroupInNotification")
 
     var remoteDns by configurationStore.string(Key.REMOTE_DNS) { "https://8.8.8.8/dns-query" }
     var directDns by configurationStore.string(Key.DIRECT_DNS) { "https://223.5.5.5/dns-query" }
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 336dc52..12f125c 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -467,4 +467,5 @@
     <string name="landing_proxy">落地代理</string>
     <string name="shadowtls_version">ShadowTLS 版本</string>
     <string name="share_subscription">分享订阅</string>
+    <string name="show_group_in_notification">在通知中显示组名</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index a37ae92..2977117 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -508,5 +508,6 @@ Anyone can write advanced plugins, which can control NekoBox. please download an
     <string name="action_shadowtls" translatable="false">ShadowTLS</string>
     <string name="shadowtls_version">ShadowTLS Version</string>
     <string name="share_subscription">Share Subscription</string>
+    <string name="show_group_in_notification">Show group name in in notification</string>
 
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/xml/global_preferences.xml b/app/src/main/res/xml/global_preferences.xml
index 2a112f3..5ce9c99 100644
--- a/app/src/main/res/xml/global_preferences.xml
+++ b/app/src/main/res/xml/global_preferences.xml
@@ -41,11 +41,6 @@
             app:icon="@drawable/baseline_public_24"
             app:key="mtu"
             app:title="@string/mtu" />
-        <SwitchPreference
-            app:defaultValue="true"
-            app:key="profileTrafficStatistics"
-            app:summary="@string/profile_traffic_statistics_summary"
-            app:title="@string/profile_traffic_statistics" />
         <moe.matsuri.nb4a.ui.SimpleMenuPreference
             app:defaultValue="1000"
             app:entries="@array/notification_entry"
@@ -54,6 +49,14 @@
             app:key="speedInterval"
             app:title="@string/speed_interval"
             app:useSimpleSummaryProvider="true" />
+        <SwitchPreference
+            app:defaultValue="true"
+            app:key="profileTrafficStatistics"
+            app:summary="@string/profile_traffic_statistics_summary"
+            app:title="@string/profile_traffic_statistics" />
+        <SwitchPreference
+            app:key="showGroupInNotification"
+            app:title="@string/show_group_in_notification" />
         <SwitchPreference
             app:icon="@drawable/ic_baseline_center_focus_weak_24"
             app:key="alwaysShowAddress"