diff --git a/app/build.gradle b/app/build.gradle
index c3337ef..d3db07e 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -13,8 +13,8 @@ android {
         applicationId "com.github.kr328.clash"
         minSdkVersion 24
         targetSdkVersion 29
-        versionCode 10019
-        versionName "1.0.19-alpha"
+        versionCode 10020
+        versionName "1.0.20-alpha"
     }
     buildTypes {
         release {
diff --git a/app/src/main/java/com/github/kr328/clash/MainActivity.kt b/app/src/main/java/com/github/kr328/clash/MainActivity.kt
index 5e480fd..42c8bac 100644
--- a/app/src/main/java/com/github/kr328/clash/MainActivity.kt
+++ b/app/src/main/java/com/github/kr328/clash/MainActivity.kt
@@ -90,7 +90,7 @@ class MainActivity : BaseActivity() {
                     activity_main_clash_status_icon.setImageResource(R.drawable.ic_clash_started)
                     activity_main_clash_status_title.text = getString(R.string.clash_status_started)
                     activity_main_clash_status_summary.text =
-                        getString(R.string.clash_status_forwarded_traffic, "0 Bytes")
+                        getString(R.string.clash_status_forwarded_traffic, ByteFormatter.byteToString(0))
                     activity_main_clash_proxies.visibility = View.VISIBLE
                     activity_main_clash_logs.visibility = View.VISIBLE
                 }
diff --git a/core/src/main/golang/bridge/statistics.go b/core/src/main/golang/bridge/statistics.go
index 402a3ec..f38ce27 100644
--- a/core/src/main/golang/bridge/statistics.go
+++ b/core/src/main/golang/bridge/statistics.go
@@ -31,6 +31,13 @@ func PollTraffic(traffic Traffic) *EventPoll {
 	stopChannel := make(chan int, 1)
 	ticker := time.NewTicker(time.Second)
 
+	tick := func() {
+		up, down := tunnel.DefaultManager.Now()
+		traffic.OnEvent(down, up)
+	}
+
+	tick()
+
 	go func() {
 		defer close(stopChannel)
 		defer log.Infoln("Traffic Poll Stopped")
@@ -40,8 +47,7 @@ func PollTraffic(traffic Traffic) *EventPoll {
 			case <-stopChannel:
 				return
 			case <-ticker.C:
-				up, down := tunnel.DefaultManager.Now()
-				traffic.OnEvent(down, up)
+				tick()
 			}
 		}
 	}()
@@ -57,6 +63,13 @@ func PollBandwidth(bandwidth Bandwidth) *EventPoll {
 	stopChannel := make(chan int, 1)
 	ticker := time.NewTicker(time.Second)
 
+	tick := func() {
+		s := tunnel.DefaultManager.Snapshot()
+		bandwidth.OnEvent(s.DownloadTotal + s.UploadTotal)
+	}
+
+	tick()
+
 	go func() {
 		defer close(stopChannel)
 		defer log.Infoln("Bandwidth Poll Stopped")
@@ -66,8 +79,7 @@ func PollBandwidth(bandwidth Bandwidth) *EventPoll {
 			case <-stopChannel:
 				return
 			case <-ticker.C:
-				s := tunnel.DefaultManager.Snapshot()
-				bandwidth.OnEvent(s.DownloadTotal + s.UploadTotal)
+				tick()
 			}
 		}
 	}()
diff --git a/core/src/main/golang/clash b/core/src/main/golang/clash
index 78b0f8c..b6166ab 160000
--- a/core/src/main/golang/clash
+++ b/core/src/main/golang/clash
@@ -1 +1 @@
-Subproject commit 78b0f8c71846dd8cc800648a82eff8d40a6b3868
+Subproject commit b6166ab57d1e944003a00e541f54e40939935db3
diff --git a/core/src/main/java/com/github/kr328/clash/core/utils/ByteFormatter.kt b/core/src/main/java/com/github/kr328/clash/core/utils/ByteFormatter.kt
index ec4879f..bcb09ee 100644
--- a/core/src/main/java/com/github/kr328/clash/core/utils/ByteFormatter.kt
+++ b/core/src/main/java/com/github/kr328/clash/core/utils/ByteFormatter.kt
@@ -4,11 +4,11 @@ object ByteFormatter {
     fun byteToString(bytes: Long): String {
         return when {
             bytes > 1024 * 1024 * 1024 ->
-                String.format("%.2f GB", (bytes.toDouble() / 1024 / 1024 / 1024))
+                String.format("%.2f GiB", (bytes.toDouble() / 1024 / 1024 / 1024))
             bytes > 1024 * 1024 ->
-                String.format("%.2f MB", (bytes.toDouble() / 1024 / 1024))
+                String.format("%.2f MiB", (bytes.toDouble() / 1024 / 1024))
             bytes > 1024 ->
-                String.format("%.2f KB", (bytes.toDouble() / 1024))
+                String.format("%.2f KiB", (bytes.toDouble() / 1024))
             else ->
                 "$bytes Bytes"
         }
diff --git a/service/src/main/java/com/github/kr328/clash/service/ClashNotification.kt b/service/src/main/java/com/github/kr328/clash/service/ClashNotification.kt
index 8618f7d..3817f58 100644
--- a/service/src/main/java/com/github/kr328/clash/service/ClashNotification.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/ClashNotification.kt
@@ -25,6 +25,7 @@ class ClashNotification(private val context: Service) {
         .setOngoing(true)
         .setColor(context.getColor(R.color.colorAccentService))
         //.setColorized(true)
+        .setOnlyAlertOnce(true)
         .setShowWhen(false)
         .setContentIntent(
             PendingIntent.getActivity(