diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 4326b978..7eebe094 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -165,7 +165,11 @@
 
         <receiver
             android:name=".MicroPhotoService$AlarmReceiver"
-            android:exported="true" />
+            android:exported="true" >
+            <intent-filter>
+                <action android:name="android.intent.action.TIME_CHANGED"/>
+            </intent-filter>
+        </receiver>
         <receiver
             android:name=".BootBroadcastReceiver"
             android:enabled="true"
diff --git a/app/src/main/java/com/xypower/mpapp/MicroPhotoService.java b/app/src/main/java/com/xypower/mpapp/MicroPhotoService.java
index d69998ec..e75d5057 100644
--- a/app/src/main/java/com/xypower/mpapp/MicroPhotoService.java
+++ b/app/src/main/java/com/xypower/mpapp/MicroPhotoService.java
@@ -134,6 +134,9 @@ public class MicroPhotoService extends Service {
     private static final String ACTION_HEARTBEAT_MANUALLY = "com.xypower.mpapp.ACT_HB_M";
     private static final String ACTION_UPDATE_CONFIGS = "com.xypower.mpapp.ACT_UPD_CFG";
     public static final String ACTION_VIDEO_FINISHED = "com.xypower.mpapp.ACT_V_FINISHED";
+
+    public static final String ACTION_TIME_CHANGED = "android.intent.action.TIME_CHANGED";
+
     private static final String EXTRA_PARAM_CHANNEL = "Channel";
     private static final String EXTRA_PARAM_PRESET = "Preset";
     private static final String EXTRA_PARAM_PHOTO_OR_VIDEO = "PhotoOrVideo";
@@ -332,6 +335,7 @@ public class MicroPhotoService extends Service {
             intentFilter.addAction(ACTION_HEARTBEAT_MANUALLY);
             intentFilter.addAction(ACTION_GPS_TIMEOUT);
             intentFilter.addAction(ACTION_RESTART);
+            intentFilter.addAction(ACTION_TIME_CHANGED);
             getApplicationContext().registerReceiver(mAlarmReceiver, intentFilter, Context.RECEIVER_EXPORTED | Context.RECEIVER_VISIBLE_TO_INSTANT_APPS);
         }
         {
@@ -518,10 +522,13 @@ public class MicroPhotoService extends Service {
                 }
 
                 try {
-                    Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage(MicroPhotoContext.PACKAGE_NAME_MPMASTER);
-                    // launchIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
-                    if (launchIntent != null) {
-                        context.startActivity(launchIntent);
+                    boolean mpmstAlive = MicroPhotoContext.isAppAlive(context, MicroPhotoContext.PACKAGE_NAME_MPMASTER);
+                    if (!mpmstAlive) {
+                        Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage(MicroPhotoContext.PACKAGE_NAME_MPMASTER);
+                        // launchIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
+                        if (launchIntent != null) {
+                            context.startActivity(launchIntent);
+                        }
                     }
                 } catch (Exception ex) {
                     ex.printStackTrace();
@@ -703,6 +710,8 @@ public class MicroPhotoService extends Service {
                     ex.printStackTrace();
                 }
                 restartSelfImpl(context, reason);
+            } else if (TextUtils.equals(ACTION_TIME_CHANGED, action)) {
+
             }
         }
     }