diff --git a/README.MD b/README.MD
index 596e9da..be0ff7a 100644
--- a/README.MD
+++ b/README.MD
@@ -40,7 +40,7 @@
 ### Python
 * 安装
 ```sh
-pip install wcferry
+pip install --upgrade wcferry
 ```
 
 * 运行
@@ -112,6 +112,9 @@ RPC 的通信部分和序列化 / 反序列化部分。
 跟 `launcher` 类似，命令行版启动器。
 
 ## 版本更新
+### v3.7.0.30.21（2023.03.15）
+* 发送表情
+
 ### v3.7.0.30.20（2023.03.12）
 修复 wxid 获取问题。
 
diff --git a/python/README.MD b/python/README.MD
index afe79ac..36fa9b4 100644
--- a/python/README.MD
+++ b/python/README.MD
@@ -3,7 +3,7 @@
 
 ## 快速开始
 ```sh
-pip install wcferry
+pip install --upgrade wcferry
 ```
 
 参考 Demo：
@@ -53,10 +53,12 @@ def main():
     ret = wcf.send_text("Hello world.", "filehelper")
     LOG.info(f"send_text: {ret}")
 
-    # 需要确保图片路径正确
-    ret = wcf.send_image("TEQuant.jpeg", "filehelper")
+    ret = wcf.send_image("TEQuant.jpeg", "filehelper")  # 需要确保图片路径正确
     LOG.info(f"send_image: {ret}")
 
+    ret = wcf.send_file("README.MD", "filehelper")  # 需要确保文件路径正确
+    LOG.info(f"send_file: {ret}")
+
     LOG.info(f"Message types:\n{wcf.get_msg_types()}")
     LOG.info(f"Contacts:\n{wcf.get_contacts()}")
 
@@ -75,6 +77,9 @@ def main():
     ret = wcf.send_xml("filehelper", xml, 0x21)
     LOG.info(f"send_xml: {ret}")
 
+    ret = wcf.send_emotion("emo.gif", "filehelper")  # 需要确保 gif 路径正确
+    LOG.info(f"send_emotion: {ret}")
+
     # 一直运行
     wcf.keep_running()
 
diff --git a/python/demo.py b/python/demo.py
index e38a3e4..e7d969f 100644
--- a/python/demo.py
+++ b/python/demo.py
@@ -63,7 +63,7 @@ def main():
     # ret = wcf.add_chatroom_members("chatroom id", "wxid1,wxid2,wxid3,...")
     # LOG.info(f"add_chatroom_members: {ret}")
 
-    xml = '<?xml version="1.0"?><msg><appmsg appid="" sdkver="0"><title>叮当药房，24小时服务，28分钟送药到家！</title><des>叮当快药首家承诺范围内28分钟送药到家！叮当快药核心区域内7*24小时全天候服务，送药上门！叮当快药官网为您提供快捷便利，正品低价，安全放心的购药、送药服务体验。</des><action>view</action><type>33</type><showtype>0</showtype><content /><url>https://mp.weixin.qq.com/mp/waerrpage?appid=wxc2edadc87077fa2a&amp;type=upgrade&amp;upgradetype=3#wechat_redirect</url><dataurl /><lowurl /><lowdataurl /><recorditem /><thumburl /><messageaction /><md5>7f6f49d301ebf47100199b8a4fcf4de4</md5><extinfo /><sourceusername>gh_c2b88a38c424@app</sourceusername><sourcedisplayname>叮当快药 药店送药到家夜间买药</sourcedisplayname><commenturl /><appattach><totallen>0</totallen><attachid /><emoticonmd5></emoticonmd5><fileext>jpg</fileext><filekey>da0e08f5c7259d03da150d5e7ca6d950</filekey><cdnthumburl>3057020100044b30490201000204e4c0232702032f4ef20204a6bace6f02046401f62d042430326337303430352d333734332d343362652d623335322d6233333566623266376334620204012400030201000405004c537600</cdnthumburl><aeskey>0db26456caf243fbd4efb99058a01d66</aeskey><cdnthumbaeskey>0db26456caf243fbd4efb99058a01d66</cdnthumbaeskey><encryver>1</encryver><cdnthumblength>61558</cdnthumblength><cdnthumbheight>100</cdnthumbheight><cdnthumbwidth>100</cdnthumbwidth></appattach><weappinfo><pagepath>pages/index/index.html</pagepath><username>gh_c2b88a38c424@app</username><appid>wxc2edadc87077fa2a</appid><version>197</version><type>2</type><weappiconurl>http://wx.qlogo.cn/mmhead/Q3auHgzwzM4727n0NQ0ZIPQPlfp15m1WLsnrXbo1kLhFGcolgLyc0A/96</weappiconurl><appservicetype>0</appservicetype><shareId>1_wxc2edadc87077fa2a_29177e9a9b918cb9e75964f80bb8f32e_1677849476_0</shareId></weappinfo><websearch /></appmsg><fromusername>wxid_eob5qfcrv4zd22</fromusername><scene>0</scene><appinfo><version>1</version><appname /></appinfo><commenturl /></msg>'
+    xml = '<?xml version="1.0"?><msg><appmsg appid="" sdkver="0"><title>叮当药房，24小时服务，28分钟送药到家！</title><des>叮当快药首家承诺范围内28分钟送药到家！叮当快药核心区域内7*24小时全天候服务，送药上门！叮当快药官网为您提供快捷便利，正品低价，安全放心的购药、送药服务体验。</des><action>view</action><type>33</type><showtype>0</showtype><content /><url>https://mp.weixin.qq.com/mp/waerrpage?appid=wxc2edadc87077fa2a&amp;type=upgrade&amp;upgradetype=3#wechat_redirect</url><dataurl /><lowurl /><lowdataurl /><recorditem /><thumburl /><messageaction /><md5>7f6f49d301ebf47100199b8a4fcf4de4</md5><extinfo /><sourceusername>gh_c2b88a38c424@app</sourceusername><sourcedisplayname>叮当快药 药店送药到家夜间买药</sourcedisplayname><commenturl /><appattach><totallen>0</totallen><attachid /><emoticonmd5></emoticonmd5><fileext>jpg</fileext><filekey>da0e08f5c7259d03da150d5e7ca6d950</filekey><cdnthumburl>3057020100044b30490201000204e4c0232702032f4ef20204a6bace6f02046401f62d042430326337303430352d333734332d343362652d623335322d6233333566623266376334620204012400030201000405004c537600</cdnthumburl><aeskey>0db26456caf243fbd4efb99058a01d66</aeskey><cdnthumbaeskey>0db26456caf243fbd4efb99058a01d66</cdnthumbaeskey><encryver>1</encryver><cdnthumblength>61558</cdnthumblength><cdnthumbheight>100</cdnthumbheight><cdnthumbwidth>100</cdnthumbwidth></appattach><weappinfo><pagepath>pages/index/index.html</pagepath><username>gh_c2b88a38c424@app</username><appid>wxc2edadc87077fa2a</appid><version>197</version><type>2</type><weappiconurl>http://wx.qlogo.cn/mmhead/Q3auHgzwzM4727n0NQ0ZIPQPlfp15m1WLsnrXbo1kLhFGcolgLyc0A/96</weappiconurl><appservicetype>0</appservicetype><shareId>1_wxc2edadc87077fa2a_29177e9a9b918cb9e75964f80bb8f32e_1677849476_0</shareId></weappinfo><websearch /></appmsg><fromusername>wxid_xxxxxxxxxxxxxx</fromusername><scene>0</scene><appinfo><version>1</version><appname /></appinfo><commenturl /></msg>'
     ret = wcf.send_xml("filehelper", xml, 0x21)
     LOG.info(f"send_xml: {ret}")
 
diff --git a/python/wcferry/client.py b/python/wcferry/client.py
index e4dc62b..533e0e5 100644
--- a/python/wcferry/client.py
+++ b/python/wcferry/client.py
@@ -19,7 +19,7 @@ WCF_ROOT = os.path.abspath(os.path.dirname(__file__))
 sys.path.insert(0, WCF_ROOT)
 import wcf_pb2  # noqa
 
-__version__ = "3.7.0.30.20"
+__version__ = "3.7.0.30.21"
 
 
 def _retry():