diff --git a/examples.py b/examples.py
index 6e3081a..66449ad 100644
--- a/examples.py
+++ b/examples.py
@@ -3,13 +3,14 @@
 
 from wechatpayv3 import WeChatPay, WeChatPayType
 
-wxpay = WeChatPay(wechatpay_type=WeChatPayType.MINIPROG,
-                  mchid=MCHID,
-                  mch_parivate_key=MCH_PRIVATE_KEY,
-                  mch_key_serial_no=MCH_KEY_SERIAL_NO,
-                  wechat_certificate=WECHAT_CERTIFICATE,
-                  appid=APPID,
-                  notify_url=NOTIFY_URL)
+wxpay = WeChatPay(
+    wechatpay_type=WeChatPayType.MINIPROG,
+    mchid=MCHID,
+    mch_parivate_key=MCH_PRIVATE_KEY,
+    mch_key_serial_no=MCH_KEY_SERIAL_NO,
+    wechat_certificate=WECHAT_CERTIFICATE,
+    appid=APPID,
+    notify_url=NOTIFY_URL)
 
 
 def certificate():
@@ -18,10 +19,11 @@ def certificate():
 
 
 def pay():
-    code, message = wxpay.pay(description='demo-description',
-                              out_trade_no='demo-trade-no',
-                              amount={'total': 100},
-                              payer={'openid': 'demo-openid'})
+    code, message = wxpay.pay(
+        description='demo-description',
+        out_trade_no='demo-trade-no',
+        amount={'total': 100},
+        payer={'openid': 'demo-openid'})
     print('code: %s, message: %s' % (code, message))
 
 
@@ -36,9 +38,10 @@ def close():
 
 
 def refund():
-    code, message = wxpay.refund(transaction_id='demo-transation-id',
-                                 out_refund_no='demo-out-refund-no',
-                                 amount={'refund': 100, 'total': 100, 'currency': 'CNY'})
+    code, message = wxpay.refund(
+        transaction_id='demo-transation-id',
+        out_refund_no='demo-out-refund-no',
+        amount={'refund': 100, 'total': 100, 'currency': 'CNY'})
     print('code: %s, message: %s' % (code, message))
 
 
@@ -64,8 +67,15 @@ def download_bill():
 
 
 def combine_pay():
-    code, message = wxpay.combine_pay(combine_out_trade_no='demo_out_trade_no', sub_orders=[{'mchid': '1900000109', 'attach': '深圳分店', 'amount': {
-                                      'total_amount': 100, 'currency': 'CNY'}, 'out_trade_no': '20150806125346', 'description': '腾讯充值中心-QQ会员充值', 'settle_info': {'profit_sharing': False, 'subsidy_amount': 10}}])
+    code, message = wxpay.combine_pay(
+        combine_out_trade_no='demo_out_trade_no',
+        sub_orders=[{'mchid': '1900000109',
+                     'attach': '深圳分店',
+                     'amount': {'total_amount': 100, 'currency': 'CNY'},
+                     'out_trade_no': '20150806125346',
+                     'description': '腾讯充值中心-QQ会员充值',
+                     'settle_info': {'profit_sharing': False, 'subsidy_amount': 10}}],
+        combine_payer_info={'openid':'oUpF8uMuAJO_M2pxb1Q9zNjWeS6o'})
     print('code: %s, message: %s' % (code, message))
 
 
@@ -76,8 +86,9 @@ def combine_query():
 
 
 def combine_close():
-    code, message = wxpay.combine_close(combine_out_trade_no='demo_out_trade_no', sub_orders=[
-                                        {'mchid': '1900000109', 'out_trade_no': '20150806125346'}])
+    code, message = wxpay.combine_close(
+        combine_out_trade_no='demo_out_trade_no',
+        sub_orders=[{'mchid': '1900000109', 'out_trade_no': '20150806125346'}])
     print('code: %s, message: %s' % (code, message))
 
 
diff --git a/setup.py b/setup.py
index 58d2b1e..b00f4f8 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 
 setup(
     name="wechatpayv3",
-    version="0.46",
+    version="0.47",
     author="minibear",
     description="微信支付接口V3版python库",
     long_description=long_description,
diff --git a/wechatpayv3/api.py b/wechatpayv3/api.py
index 3c66dc2..eccde40 100644
--- a/wechatpayv3/api.py
+++ b/wechatpayv3/api.py
@@ -109,9 +109,7 @@ def close(self, out_trade_no):
         if not out_trade_no:
             raise Exception('out_trade_no is not assigned.')
         path = '/v3/pay/transactions/out-trade-no/%s/close' % out_trade_no
-        params = {}
-        params['mchid'] = self._mchid
-        params['out_trade_no'] = out_trade_no
+        params = {'mchid': self._mchid}
         return self._core.post(path, data=params)
 
     def query(self, transaction_id=None, out_trade_no=None):
@@ -158,7 +156,7 @@ def refund(self,
         else:
             raise Exception('amount is not assigned.')
         if transaction_id:
-            params.update({'transation_id': transaction_id})
+            params.update({'transaction_id': transaction_id})
         if out_trade_no:
             params.update({'out_trade_no': out_trade_no})
         if reason:
diff --git a/wechatpayv3/core.py b/wechatpayv3/core.py
index ae15e31..ec77f17 100644
--- a/wechatpayv3/core.py
+++ b/wechatpayv3/core.py
@@ -32,7 +32,7 @@ def get(self, path):
                 return -1, '{"message": "微信支付平台证书序号不一致"}'
             if not verify_response(timestamp, nonce, body, signature, self._wechat_certificate):
                 return -1, '{"message": "应答签名验证失败"}'
-        return response.status_code, response.content
+        return response.status_code, response.text
 
     def post(self, path, data=None):
         headers = {}
@@ -56,4 +56,4 @@ def post(self, path, data=None):
                 return -1, '{"message": "微信支付平台证书序号不一致"}'
             if not verify_response(timestamp, nonce, body, signature, self._wechat_certificate):
                 return -1, '{"message": "应答签名验证失败"}'
-        return response.status_code, response.content
+        return response.status_code, response.text