diff --git a/common/src/main/java/com/xypower/common/MicroPhotoContext.java b/common/src/main/java/com/xypower/common/MicroPhotoContext.java
index 9d219484..0f7cfc03 100644
--- a/common/src/main/java/com/xypower/common/MicroPhotoContext.java
+++ b/common/src/main/java/com/xypower/common/MicroPhotoContext.java
@@ -53,6 +53,7 @@ public class MicroPhotoContext {
         public int heartbeat;   // Unit minute
         public int[] absHeartbeats; // second
         public int separateNetwork;
+        public int mpappMonitorTimeout = 30 * 60000;    // 30 minutes
 
         public String getUrl() {
             if (TextUtils.isEmpty(server)) {
@@ -241,6 +242,12 @@ public class MicroPhotoContext {
             masterConfig.quickHbMode = jsonObject.optInt("quickHbMode", 0);
             masterConfig.usingAbsHbTime = jsonObject.optInt("usingAbsHbTime", 0);
             masterConfig.separateNetwork = jsonObject.optInt("separateNetwork", 0);
+            // masterConfig.mpappMonitorTimeout = jsonObject.optInt("mpappMonitorTimeout", 30 * 60000);
+            int mpappMonitorTimeout = jsonObject.optInt("mpappMonitorTimeout", 30 * 60000);
+            if (mpappMonitorTimeout >= 4 * 60000 && mpappMonitorTimeout <= 35 * 60000) {
+                masterConfig.mpappMonitorTimeout = mpappMonitorTimeout;
+            }
+
             // long defaultHearbeat = masterConfig.separateNetwork == 0 ? DEFAULT_HEARTBEAT_FOR_SHARED_NW : DEFAULT_HEARTBEAT_FOR_SEPARATE_NW;
             masterConfig.heartbeat = jsonObject.optInt("heartbeat", DEFAULT_HEARTBEAT_FOR_SHARED_NW);
             if (jsonObject.has("absHeartbeats")) {
diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index ccd3cc94..7a8b4a99 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -219,6 +219,7 @@ public class MpMasterService extends Service {
         mHeartbeatDuration = masterConfig.heartbeat * 10;   // minute to second
         mAbsHeartbeatTimes = masterConfig.absHeartbeats;
         mSeparateNetwork = masterConfig.separateNetwork != 0;
+        mTimeOfMpAppAlive = masterConfig.mpappMonitorTimeout;
     }
 
     // public boolean useSeparater