diff --git a/app/controllers/wechats/js_sdk_signatures_controller.rb b/app/controllers/wechats/js_sdk_signatures_controller.rb
index 6d7b3d87d..0b66cc263 100644
--- a/app/controllers/wechats/js_sdk_signatures_controller.rb
+++ b/app/controllers/wechats/js_sdk_signatures_controller.rb
@@ -1,6 +1,6 @@
 class Wechats::JsSdkSignaturesController < ApplicationController
   def create
-    timestamp = (Time.now.to_f * 1000).to_i
+    timestamp = Time.now.to_i
     noncestr = ('A'..'z').to_a.sample(8).join
     signature = Util::Wechat.js_sdk_signature(params[:url], noncestr, timestamp)
 
diff --git a/app/libs/util/wechat.rb b/app/libs/util/wechat.rb
index 069322f18..1b064ba94 100644
--- a/app/libs/util/wechat.rb
+++ b/app/libs/util/wechat.rb
@@ -7,7 +7,8 @@ module Util::Wechat
     attr_accessor :appid, :secret
 
     def js_sdk_signature(url, noncestr, timestamp)
-      str = { jsapi_ticket: jsapi_ticket, noncestr: noncestr, timestamp: timestamp, url: url }.to_query
+      data = { jsapi_ticket: jsapi_ticket, noncestr: noncestr, timestamp: timestamp, url: url }
+      str = data.map { |k, v| "#{k}=#{v}" }.join('&')
       Digest::SHA1.hexdigest(str)
     end
 
diff --git a/public/react/src/App.js b/public/react/src/App.js
index 3013eca7b..af9e33bd6 100644
--- a/public/react/src/App.js
+++ b/public/react/src/App.js
@@ -286,8 +286,9 @@ class App extends Component {
 			const wx = window.wx
 			const url = '/wechats/js_sdk_signature.json'
 			const currentUrl = window.location.href.split('#')[0]
+			// window.encodeURIComponent()
 			axios.post(url, {
-				url: currentUrl,
+				url: window.__testUrl || currentUrl,
 			}).then((response) => {
 				console.log('got res')
 				const data = response.data;
@@ -295,7 +296,7 @@ class App extends Component {
 					debug: false,
 					appId: data.appid,
 					timestamp: data.timestamp,
-					nonceStr: data.nonceStr,
+					nonceStr: data.noncestr,
 					signature: data.signature,
 					jsApiList: [
 						'onMenuShareTimeline',//
diff --git a/public/react/src/modules/courses/busyWork/commonWork.js b/public/react/src/modules/courses/busyWork/commonWork.js
index 20343c870..f8042d476 100644
--- a/public/react/src/modules/courses/busyWork/commonWork.js
+++ b/public/react/src/modules/courses/busyWork/commonWork.js
@@ -227,7 +227,7 @@ class commonWork extends Component{
     
   }
   clearSelection = () => {
-    this.setState({ checkBoxValues: [] })
+    this.setState({ checkBoxValues: [], checkAll: false })
   }
   // 
   onSetPublic = () => {