diff --git a/miniprogram/pages/treating/treating.js b/miniprogram/pages/treating/treating.js
index 732d344..95de4ad 100644
--- a/miniprogram/pages/treating/treating.js
+++ b/miniprogram/pages/treating/treating.js
@@ -1,4 +1,5 @@
 var ble = require('../../services/ble')
+var api = require('../../utils/api')
 var commandSync = require('../../services/command-sync')
 var config = require('../../config/env')
 
@@ -52,6 +53,8 @@ Page({
     this._onDisconnect = this.onDisconnect.bind(this)
     this._onReconnect = this.onReconnect.bind(this)
     this._onReconnectFailed = this.onReconnectFailed.bind(this)
+    this._sessionId = 'SESS_' + Date.now()
+
     ble.on('status', this._onStatus)
     ble.on('treatment_complete', this._onComplete)
     ble.on('exception', this._onException)
@@ -60,6 +63,7 @@ Page({
     ble.on('reconnect_failed', this._onReconnectFailed)
     this.startLocalTimer()
     this.syncCommands()
+    this.syncTreatmentStart()
   },
 
   onUnload: function () {
@@ -117,6 +121,40 @@ Page({
     if (deviceId) commandSync.sync(deviceId)
   },
 
+  syncTreatmentStart: function () {
+    var self = this
+    var startTime = new Date(self.data.startedAt)
+    var endTime = new Date(self.data.startedAt + self.data.duration)
+    api.syncTreatment({
+      session_id: self._sessionId,
+      device_id: self._deviceId || '',
+      start_time: startTime.toISOString(),
+      end_time: endTime.toISOString(),
+      regions: self.data.regions,
+      total_duration_ms: self.data.duration,
+      mode: self.data.mode,
+      avg_pd: 0,
+      source: 'treatment_start'
+    }).catch(function () {})
+  },
+
+  syncTreatmentEnd: function (elapsed) {
+    var self = this
+    var startTime = new Date(self.data.startedAt)
+    var endTime = new Date(self.data.startedAt + elapsed)
+    api.syncTreatment({
+      session_id: self._sessionId,
+      device_id: self._deviceId || '',
+      start_time: startTime.toISOString(),
+      end_time: endTime.toISOString(),
+      regions: self.data.regions,
+      total_duration_ms: elapsed,
+      mode: self.data.mode,
+      avg_pd: 0,
+      source: 'treatment_end'
+    }).catch(function () {})
+  },
+
   onComplete: function (result) {
     this.setData({ completed: true, progress: 100 })
     var app = getApp()
@@ -137,8 +175,11 @@ Page({
 
   finishAsComplete: function () {
     var elapsed = Math.min(this.data.duration, Date.now() - this.data.startedAt)
+    if (elapsed < this.data.duration) {
+      this.syncTreatmentEnd(elapsed)
+    }
     this.onComplete({
-      session_id: 'LOCAL_' + Date.now(),
+      session_id: this._sessionId,
       regions: this.data.regions,
       total_duration_ms: elapsed,
       avg_pd: 0,
diff --git a/miniprogram/pages/treatment-done/treatment-done.js b/miniprogram/pages/treatment-done/treatment-done.js
index d3f8c73..417b0c5 100644
--- a/miniprogram/pages/treatment-done/treatment-done.js
+++ b/miniprogram/pages/treatment-done/treatment-done.js
@@ -55,8 +55,8 @@ Page({
     http.post('/api/v1/treatment/sync', {
       session_id: self.data.sessionId,
       device_id: self._deviceId || '',
-      start_time: new Date(Date.now() - self.data.duration).toISOString(),
-      end_time: new Date().toISOString(),
+      start_time: treatment.start_time || new Date(Date.now() - self.data.duration).toISOString(),
+      end_time: treatment.end_time || new Date().toISOString(),
       regions: self.data.regions,
       total_duration_ms: self.data.duration,
       mode: self.data.mode,