diff --git a/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientExecuteCgibinExmailExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientExecuteCgibinExmailExtensions.cs
index d3ac0ec2..bb18ce1c 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientExecuteCgibinExmailExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientExecuteCgibinExmailExtensions.cs
@@ -9,6 +9,30 @@ namespace SKIT.FlurlHttpClient.Wechat.Work
 {
     public static class WechatWorkClientExecuteCgibinExmailExtensions
     {
+        #region App
+        /// <summary>
+        /// <para>异步调用 [POST] /cgi-bin/exmail/app/compose_send 接口。</para>
+        /// <para>REF: https://developer.work.weixin.qq.com/document/path/97445 </para>
+        /// <para>REF: https://developer.work.weixin.qq.com/document/path/97854 </para>
+        /// <para>REF: https://developer.work.weixin.qq.com/document/path/97855 </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.CgibinExmailAppComposeSendResponse> ExecuteCgibinExmailAppComposeSendAsync(this WechatWorkClient client, Models.CgibinExmailAppComposeSendRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Post, "cgi-bin", "exmail", "app", "compose_send")
+                .SetQueryParam("access_token", request.AccessToken);
+
+            return await client.SendRequestWithJsonAsync<Models.CgibinExmailAppComposeSendResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
+        #endregion
+
         #region Group
         /// <summary>
         /// <para>异步调用 [POST] /cgi-bin/exmail/group/create 接口。</para>
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExmail/App/CgibinExmailAppComposeSendRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExmail/App/CgibinExmailAppComposeSendRequest.cs
new file mode 100644
index 00000000..c287e4f6
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExmail/App/CgibinExmailAppComposeSendRequest.cs
@@ -0,0 +1,297 @@
+using System.Collections.Generic;
+
+namespace SKIT.FlurlHttpClient.Wechat.Work.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /cgi-bin/exmail/app/compose_send 接口的请求。</para>
+    /// </summary>
+    public class CgibinExmailAppComposeSendRequest : WechatWorkRequest
+    {
+        public static class Types
+        {
+            public class Recipient
+            {
+                /// <summary>
+                /// 获取或设置邮箱地址列表。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("emails")]
+                [System.Text.Json.Serialization.JsonPropertyName("emails")]
+                public IList<string>? EmailList { get; set; }
+
+                /// <summary>
+                /// 获取或设置企业成员的 UserId 列表。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("userids")]
+                [System.Text.Json.Serialization.JsonPropertyName("userids")]
+                public IList<string>? UserIdList { get; set; }
+            }
+
+            public class Attachment
+            {
+                /// <summary>
+                /// 获取或设置内容。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("file_name")]
+                [System.Text.Json.Serialization.JsonPropertyName("file_name")]
+                public string FileName { get; set; } = string.Empty;
+
+                /// <summary>
+                /// 获取或设置经过 Base64 编码的文件内容。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("content")]
+                [System.Text.Json.Serialization.JsonPropertyName("content")]
+                public string EncodingContent { get; set; } = string.Empty;
+            }
+
+            public class Schedule
+            {
+                public static class Types
+                {
+                    public class Reminder : CgibinOAScheduleAddRequest.Types.Schedule.Types.Reminder
+                    {
+                        /// <summary>
+                        /// 获取或设置日程开始前多久提醒（单位：分钟）。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("remind_before_event_mins")]
+                        [System.Text.Json.Serialization.JsonPropertyName("remind_before_event_mins")]
+                        public new int? RemindBeforeEventTime { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置每月哪几周重复。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("repeat_week_of_month")]
+                        [System.Text.Json.Serialization.JsonPropertyName("repeat_week_of_month")]
+                        public IList<int>? RepeatWeekOfMonthList { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置每年哪几月重复。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("repeat_month_of_year")]
+                        [System.Text.Json.Serialization.JsonPropertyName("repeat_month_of_year")]
+                        public IList<int>? RepeatMonthOfYearList { get; set; }
+                    }
+                }
+
+                /// <summary>
+                /// 获取或设置日程 ID。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("schedule_id")]
+                [System.Text.Json.Serialization.JsonPropertyName("schedule_id")]
+                public string? ScheduleId { get; set; }
+
+                /// <summary>
+                /// 获取或设置日程方法。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("method")]
+                [System.Text.Json.Serialization.JsonPropertyName("method")]
+                public string? Method { get; set; }
+
+                /// <summary>
+                /// 获取或设置日程开始时间戳。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("start_time")]
+                [System.Text.Json.Serialization.JsonPropertyName("start_time")]
+                public long StartTimestamp { get; set; }
+
+                /// <summary>
+                /// 获取或设置日程结束时间戳。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("end_time")]
+                [System.Text.Json.Serialization.JsonPropertyName("end_time")]
+                public long EndTimestamp { get; set; }
+
+                /// <summary>
+                /// 获取或设置日程地点。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("location")]
+                [System.Text.Json.Serialization.JsonPropertyName("location")]
+                public string? Location { get; set; }
+
+                /// <summary>
+                /// 获取或设置日程提醒信息。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("reminders")]
+                [System.Text.Json.Serialization.JsonPropertyName("reminders")]
+                public Types.Reminder? Reminder { get; set; }
+            }
+
+            public class Meeting
+            {
+                public static class Types
+                {
+                    public class Option
+                    {
+                        /// <summary>
+                        /// 获取或设置入会密码。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("password")]
+                        [System.Text.Json.Serialization.JsonPropertyName("password")]
+                        public string? Password { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置自动录制模式。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("auto_record")]
+                        [System.Text.Json.Serialization.JsonPropertyName("auto_record")]
+                        public int? AutoRecordMode { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置是否开启等候室。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("enable_waiting_room")]
+                        [System.Text.Json.Serialization.JsonPropertyName("enable_waiting_room")]
+                        public bool? EnableWaitingRoom { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置是否允许成员在主持人进会前加入。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("allow_enter_before_host")]
+                        [System.Text.Json.Serialization.JsonPropertyName("allow_enter_before_host")]
+                        public bool? AllowEnterBeforeHost { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置限制成员入会模式。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("enter_restraint")]
+                        [System.Text.Json.Serialization.JsonPropertyName("enter_restraint")]
+                        public int? EnterRestraintMode { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置是否开启屏幕水印。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("enable_screen_watermark")]
+                        [System.Text.Json.Serialization.JsonPropertyName("enable_screen_watermark")]
+                        public bool? EnableScreenWatermark { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置成员入会时是否静音。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("enable_enter_mute")]
+                        [Newtonsoft.Json.JsonConverter(typeof(Newtonsoft.Json.Converters.NumericalNullableBooleanConverter))]
+                        [System.Text.Json.Serialization.JsonPropertyName("enable_enter_mute")]
+                        [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Converters.NumericalNullableBooleanConverter))]
+                        public bool? EnableEnterMute { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置会议开始提醒范围。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("remind_scope")]
+                        [System.Text.Json.Serialization.JsonPropertyName("remind_scope")]
+                        public int? RemindScope { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置水印类型。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("water_mark_type")]
+                        [System.Text.Json.Serialization.JsonPropertyName("water_mark_type")]
+                        public int? WaterMarkType { get; set; }
+                    }
+
+                    public class Host
+                    {
+                        /// <summary>
+                        /// 获取或设置企业成员的 UserId 列表。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("userids")]
+                        [System.Text.Json.Serialization.JsonPropertyName("userids")]
+                        public IList<string>? UserIdList { get; set; }
+                    }
+
+                    public class Administrator
+                    {
+                        /// <summary>
+                        /// 获取或设置企业成员的 UserId 列表。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("userids")]
+                        [System.Text.Json.Serialization.JsonPropertyName("userids")]
+                        public IList<string>? UserIdList { get; set; }
+                    }
+                }
+
+                /// <summary>
+                /// 获取或设置会议设置信息。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("option")]
+                [System.Text.Json.Serialization.JsonPropertyName("option")]
+                public Types.Option? Option { get; set; }
+
+                /// <summary>
+                /// 获取或设置会议主持人信息。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("hosts")]
+                [System.Text.Json.Serialization.JsonPropertyName("hosts")]
+                public Types.Host? Host { get; set; }
+
+                /// <summary>
+                /// 获取或设置会议管理员信息。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("meeting_admins")]
+                [System.Text.Json.Serialization.JsonPropertyName("meeting_admins")]
+                public Types.Administrator Administrator { get; set; } = new Types.Administrator();
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置收件人信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("to")]
+        [System.Text.Json.Serialization.JsonPropertyName("to")]
+        public Types.Recipient To { get; set; } = new Types.Recipient();
+
+        /// <summary>
+        /// 获取或设置抄送信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("cc")]
+        [System.Text.Json.Serialization.JsonPropertyName("cc")]
+        public Types.Recipient? CC { get; set; }
+
+        /// <summary>
+        /// 获取或设置密送信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("bcc")]
+        [System.Text.Json.Serialization.JsonPropertyName("bcc")]
+        public Types.Recipient? BCC { get; set; }
+
+        /// <summary>
+        /// 获取或设置标题。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("subject")]
+        [System.Text.Json.Serialization.JsonPropertyName("subject")]
+        public string Subject { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置内容。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("content")]
+        [System.Text.Json.Serialization.JsonPropertyName("content")]
+        public string Content { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置内容类型。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("content_type")]
+        [System.Text.Json.Serialization.JsonPropertyName("content_type")]
+        public string? ContentType { get; set; }
+
+        /// <summary>
+        /// 获取或设置附件列表。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("attachment_list")]
+        [System.Text.Json.Serialization.JsonPropertyName("attachment_list")]
+        public IList<Types.Attachment>? AttachmentList { get; set; }
+
+        /// <summary>
+        /// 获取或设置日程信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("schedule")]
+        [System.Text.Json.Serialization.JsonPropertyName("schedule")]
+        public Types.Schedule? Schedule { get; set; }
+
+        /// <summary>
+        /// 获取或设置会议信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("meeting")]
+        [System.Text.Json.Serialization.JsonPropertyName("meeting")]
+        public Types.Meeting? Meeting { get; set; }
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExmail/App/CgibinExmailAppComposeSendResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExmail/App/CgibinExmailAppComposeSendResponse.cs
new file mode 100644
index 00000000..251127c5
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExmail/App/CgibinExmailAppComposeSendResponse.cs
@@ -0,0 +1,9 @@
+namespace SKIT.FlurlHttpClient.Wechat.Work.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /cgi-bin/exmail/app/compose_send 接口的响应。</para>
+    /// </summary>
+    public class CgibinExmailAppComposeSendResponse : WechatWorkResponse
+    {
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/ModelSamples/CgibinExmail/App/CgibinExmailAppComposeSendRequest.json b/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/ModelSamples/CgibinExmail/App/CgibinExmailAppComposeSendRequest.json
new file mode 100644
index 00000000..753de72b
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/ModelSamples/CgibinExmail/App/CgibinExmailAppComposeSendRequest.json
@@ -0,0 +1,61 @@
+{
+    "to": {
+        "emails": ["word@bgjkcsqy.wecom.work", "jyan1@tiyantest.wang"],
+        "userids": ["william"]
+    },
+    "cc": {
+        "emails": [],
+        "userids": ["panyy"]
+    },
+    "bcc": {
+        "emails": ["zoro@bgjkcsqy.wecom.work"],
+        "userids": []
+    },
+    "subject": "这是标题",
+    "content": "这是邮件正文",
+    "attachment_list": [
+        {
+            "file_name": "a.txt",
+            "content": "BASE64_CONTENT"
+        }
+    ],
+    "schedule": {
+        "method": "request",
+        "location": "这是地点",
+        "start_time": 1669278600,
+        "end_time": 1669282200,
+        "reminders": {
+            "is_remind": 1,
+            "remind_before_event_mins": 15,
+            "is_repeat": 1,
+            "is_custom_repeat": 1,
+            "timezone": 8,
+            "repeat_interval": 1,
+            "repeat_type": 1,
+            "repeat_day_of_week": [4, 5],
+            "repeat_day_of_month": [],
+            "repeat_week_of_month": [],
+            "repeat_month_of_year": [],
+            "repeat_until": 1670745600
+        }
+    },
+    "meeting": {
+        "option": {
+            "password": "123456",
+            "auto_record": 2,
+            "enable_waiting_room": true,
+            "allow_enter_before_host": true,
+            "enter_restraint": 0,
+            "enable_screen_watermark": true,
+            "enable_enter_mute": 0,
+            "remind_scope": 2,
+            "water_mark_type": 0
+        },
+        "hosts": {
+            "userids": ["zoro"]
+        },
+        "meeting_admins": {
+            "userids": ["zoro"]
+        }
+    }
+}