diff --git a/README.md b/README.md
index c867298e7e1a8c6bbc06aaba2ad2dc8f73518ae4..34e22a726282f9167e70a30cb792335ad171b34f 100644
--- a/README.md
+++ b/README.md
@@ -184,11 +184,6 @@ Here, `client.predict` function has two arguments. `feed` is a `python dict` wit
 
 <h2 align="center">Community</h2>
 
-### User Group in China
-
-  
-<p align="center"><img width="200" height="300" margin="500" src="./doc/qq.jpeg"/>&#8194;&#8194;&#8194;&#8194;&#8194<img width="200" height="300"  src="doc/wechat.jpeg"/></p>
-<p align="center">PaddleServing交流QQ群&#8194;&#8194;&#8194;&#8194;&#8194;&#8194;&#8194;&#8194;&#8194;&#8194;&#8194;&#8194;&#8194;&#8194;&#8194;PaddleServing微信群</p>    
 
 ### Slack
 
diff --git a/python/examples/criteo_ctr_with_cube/test_client.py b/python/examples/criteo_ctr_with_cube/test_client.py
index ca752b763e067b6a73e28c1d2ab9f58b9b98ba5d..8518db55572196e470da014a02797ae9e200c988 100755
--- a/python/examples/criteo_ctr_with_cube/test_client.py
+++ b/python/examples/criteo_ctr_with_cube/test_client.py
@@ -20,6 +20,8 @@ import criteo as criteo
 import time
 from paddle_serving_client.metric import auc
 
+py_version = sys.version_info[0]
+
 client = Client()
 client.load_client_config(sys.argv[1])
 client.connect(["127.0.0.1:9292"])
@@ -34,7 +36,10 @@ label_list = []
 prob_list = []
 start = time.time()
 for ei in range(10000):
-    data = reader().next()
+    if py_version == 2:
+        data = reader().next()
+    else:
+        data = reader().__next__()
     feed_dict = {}
     feed_dict['dense_input'] = data[0][0]
     for i in range(1, 27):