diff --git a/README.md b/README.md
index 68fb062..aaca20c 100644
--- a/README.md
+++ b/README.md
@@ -142,6 +142,10 @@ Q: 为什么我在设定了`itchat.auto_login()`的`enableCmdQR`为`True`后还
 
 A: 这是由于没有安装可选的包`pillow`，可以使用右边的命令安装：`pip install pillow`
 
+Q: 如何通过这个包将自己的微信号变为控制器？
+
+A: 有两种方式：发送、接受自己UserName的消息；发送接收文件传输助手（filehelper）的消息
+
 ## Author
 
 [LittleCoder](https://github.com/littlecodersh): 整体构架及完成Python2版本。
diff --git a/itchat/client.py b/itchat/client.py
index 5c734b3..bfb96ae 100644
--- a/itchat/client.py
+++ b/itchat/client.py
@@ -8,6 +8,7 @@ from . import config, storage, out, tools
 import requests
 
 BASE_URL = config.BASE_URL
+QR_DIR = 'QR.jpg'
 
 class client(object):
     def __init__(self):
@@ -88,7 +89,6 @@ class client(object):
             if uuid == None: uuid = self.uuid
             url = '%s/qrcode/%s'%(BASE_URL, uuid)
             r = self.s.get(url, stream = True)
-            QR_DIR = 'QR.jpg'
             with open(QR_DIR, 'wb') as f: f.write(r.content)
             if enableCmdQR:
                 tools.print_cmd_qr(QR_DIR, enableCmdQR = enableCmdQR)
@@ -105,7 +105,7 @@ class client(object):
         regx = r'window.code=(\d+)'
         data = re.search(regx, r.text)
         if data and data.group(1) == '200':
-            os.remove('QR.jpg')
+            os.remove(QR_DIR)
             regx = r'window.redirect_uri="(\S+)";'
             self.loginInfo['url'] = re.search(regx, r.text).group(1)
             r = self.s.get(self.loginInfo['url'], allow_redirects=False)
@@ -392,7 +392,7 @@ class client(object):
         if not r: return
         actualUserName, content = r.groups()
         try:
-            self.storageClass.groupDict[msg['FromUserName']][ActualUserName]
+            self.storageClass.groupDict[msg['FromUserName']][actualUserName]
         except:
             groupMemberList = self.get_batch_contract(msg['FromUserName'])['MemberList']
             self.storageClass.groupDict[msg['FromUserName']] = {member['UserName']: member for member in groupMemberList}
@@ -418,6 +418,7 @@ class client(object):
                 }, }
         headers = { 'ContentType': 'application/json; charset=UTF-8' }
         r = self.s.post(url, data = json.dumps(payloads, ensure_ascii = False).encode('utf8'), headers = headers)
+        return r.json()['BaseResponse']['Ret'] == 0
     def __upload_file(self, fileDir, isPicture = False):
         if not tools.check_file(fileDir): return
         url = 'https://file%s.wx.qq.com/cgi-bin/mmwebwx-bin/webwxuploadmedia?f=json'%('2' if '2' in self.loginInfo['url'] else '')
@@ -537,6 +538,7 @@ class client(object):
 
         r = self.s.post(url, data=json.dumps(params),headers=headers)
         dic = json.loads(r.content.decode('utf8', 'replace'))
+        print(dic)
         return dic['ChatRoomName']
     def delete_member_from_chatroom(self, chatRoomName, memberList):
         url = ('%s/webwxupdatechatroom?fun=delmember&pass_ticket=%s'%(
@@ -546,7 +548,7 @@ class client(object):
             'ChatRoomName': chatRoomName,
             'DelMemberList': ','.join([member['UserName'] for member in memberList]), }
         headers = {'content-type': 'application/json; charset=UTF-8'}
-        return self.s.post(url, data=json.dumps(params),headers=headers)
+        return self.s.post(url, data=json.dumps(params),headers=headers).json()
     def add_member_into_chatroom(self, chatRoomName, memberList):
         url = ('%s/webwxupdatechatroom?fun=addmember&pass_ticket=%s'%(
             self.loginInfo['url'], self.loginInfo['pass_ticket']))
@@ -555,7 +557,7 @@ class client(object):
             'ChatRoomName': chatRoomName,
             'AddMemberList': ','.join([member['UserName'] for member in memberList]), }
         headers = {'content-type': 'application/json; charset=UTF-8'}
-        r = self.s.post(url, data=json.dumps(params),headers=headers)
+        return self.s.post(url, data=json.dumps(params),headers=headers).json()
 
 if __name__ == '__main__':
     wcc = WeChatClient()