diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Events/OpenPush/UserInfoModifiedEvent.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Events/OpenPush/UserInfoModifiedEvent.cs
new file mode 100644
index 00000000..760eecab
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Events/OpenPush/UserInfoModifiedEvent.cs
@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+
+namespace SKIT.FlurlHttpClient.Wechat.Api.Events
+{
+    /// <summary>
+    /// <para>表示 EVENT.user_info_modified 事件的数据。</para>
+    /// <para>REF: https://developers.weixin.qq.com/doc/oplatform/Mobile_App/WeChat_Login/authorization_change.html </para>
+    /// <para>REF: https://developers.weixin.qq.com/doc/oplatform/Website_App/WeChat_Login/authorization_change.html </para>
+    /// </summary>
+    public class UserInfoModifiedEvent : WechatApiEvent, WechatApiEvent.Serialization.IJsonSerializable, WechatApiEvent.Serialization.IXmlSerializable
+    {
+        /// <summary>
+        /// 获取或设置微信 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("appid")]
+        [System.Xml.Serialization.XmlElement("appid")]
+        public string AppId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置用户 OpenId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("openid")]
+        [System.Text.Json.Serialization.JsonPropertyName("openid")]
+        [System.Xml.Serialization.XmlElement("openid")]
+        public string OpenId { get; set; } = default!;
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/OpenPush/UserInfoModifiedEvent.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/OpenPush/UserInfoModifiedEvent.json
new file mode 100644
index 00000000..0f44be04
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/OpenPush/UserInfoModifiedEvent.json
@@ -0,0 +1,9 @@
+{
+    "ToUserName": "gh_SDK_870882ca4b1",
+    "FromUserName": "oaKk346BaWE-eIn4oSRWbaM9vR7s",
+    "CreateTime": 1627359464,
+    "MsgType": "event",
+    "Event": "user_info_modified",
+    "openid": "oaKk343WOktAaT2ygsX138BGblrg",
+    "appid" : "wx13974bf780d3dc89"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/OpenPush/UserInfoModifiedEvent.xml b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/OpenPush/UserInfoModifiedEvent.xml
new file mode 100644
index 00000000..87263a74
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/OpenPush/UserInfoModifiedEvent.xml
@@ -0,0 +1,9 @@
+<xml>
+    <ToUserName><![CDATA[gh_SDK_870882ca4b1]]></ToUserName>
+    <FromUserName><![CDATA[owAqB1v0ahK_Xlc7GshIDdf2yf7E]]></FromUserName>
+    <CreateTime>1626857200</CreateTime>
+    <MsgType><![CDATA[event]]></MsgType>
+    <Event><![CDATA[user_info_modified]]></Event>
+    <openid><![CDATA[owAqB1nqaOYYWl0Ng484G2z5NIwU]]></openid>
+    <appid><![CDATA[wx13974bf780d3dc89]]></appid>
+</xml>