diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Events/WxaMiniShop/ComplaintCallbackEvent.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Events/WxaMiniShop/ComplaintCallbackEvent.cs
index e82efd3f..fa1fe270 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Events/WxaMiniShop/ComplaintCallbackEvent.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Events/WxaMiniShop/ComplaintCallbackEvent.cs
@@ -1,3 +1,5 @@
+using System;
+
 namespace SKIT.FlurlHttpClient.Wechat.Api.Events
 {
     /// <summary>
@@ -9,6 +11,8 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Events
     /// </summary>
     public class ComplaintCallbackEvent : WechatApiEvent
     {
+        private readonly object _lockObj = new object();
+
         public static class Types
         {
             public class EventData
@@ -22,6 +26,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Events
                         /// </summary>
                         [Newtonsoft.Json.JsonProperty("time")]
                         [System.Text.Json.Serialization.JsonPropertyName("time")]
+                        [System.Text.Json.Serialization.JsonNumberHandling(System.Text.Json.Serialization.JsonNumberHandling.AllowReadingFromString)]
                         [System.Xml.Serialization.XmlElement("time")]
                         public long Timestamp { get; set; }
 
@@ -46,150 +51,546 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Events
                 /// <summary>
                 /// 获取或设置小程序 AppId。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("appid")]
-                [System.Text.Json.Serialization.JsonPropertyName("appid")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("appid")]
                 public string AppId { get; set; } = default!;
 
                 /// <summary>
                 /// 获取或设置事件通知类型。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("option_type")]
-                [System.Text.Json.Serialization.JsonPropertyName("option_type")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("option_type")]
                 public string OptionType { get; set; } = default!;
 
                 /// <summary>
                 /// 获取或设置投诉单号。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("complaint_order_id")]
-                [System.Text.Json.Serialization.JsonPropertyName("complaint_order_id")]
-                [System.Text.Json.Serialization.JsonNumberHandling(System.Text.Json.Serialization.JsonNumberHandling
-                    .AllowReadingFromString)]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("complaint_order_id")]
                 public long ComplaintOrderId { get; set; }
 
                 /// <summary>
                 /// 获取或设置用户 OpenId。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("open_id")]
-                [System.Text.Json.Serialization.JsonPropertyName("open_id")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("open_id")]
                 public string OpenId { get; set; } = default!;
 
                 /// <summary>
                 /// 获取或设置投诉问题类型。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("type")]
-                [System.Text.Json.Serialization.JsonPropertyName("type")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("type")]
                 public int Type { get; set; }
 
                 /// <summary>
                 /// 获取或设置订单状态。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("status")]
-                [System.Text.Json.Serialization.JsonPropertyName("status")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("status")]
                 public int Status { get; set; }
 
                 /// <summary>
                 /// 获取或设置用户手机号码。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("phone_number")]
-                [System.Text.Json.Serialization.JsonPropertyName("phone_number")]
-                [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Serialization.Common.NumericalStringConverter))]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("phone_number")]
                 public string PhoneNumber { get; set; } = default!;
 
                 /// <summary>
                 /// 获取或设置投诉材料内容。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("customer_material_content")]
-                [System.Text.Json.Serialization.JsonPropertyName("customer_material_content")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("customer_material_content", IsNullable = true)]
                 public string? CustomerMaterialContent { get; set; }
 
                 /// <summary>
                 /// 获取或设置投诉材料图片 MediaId 列表字符串（以逗号分隔）。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("customer_material_media_id_list")]
-                [System.Text.Json.Serialization.JsonPropertyName("customer_material_media_id_list")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("customer_material_media_id_list", IsNullable = true)]
                 public string? CustomerMaterialMediaIdListString { get; set; }
 
                 /// <summary>
                 /// 获取或设置订单号。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("order_id")]
-                [System.Text.Json.Serialization.JsonPropertyName("order_id")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("order_id")]
                 public string OrderId { get; set; } = default!;
 
                 /// <summary>
                 /// 获取或设置商户订单号。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("out_trade_no")]
-                [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("out_trade_no")]
                 public string OutTradeNumber { get; set; } = default!;
 
                 /// <summary>
                 /// 获取或设置商品名称。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("product_name")]
-                [System.Text.Json.Serialization.JsonPropertyName("product_name")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("product_name")]
                 public string ProductName { get; set; } = default!;
 
                 /// <summary>
                 /// 获取或设置支付时间戳。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("pay_time")]
-                [System.Text.Json.Serialization.JsonPropertyName("pay_time")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("pay_time")]
                 public long PayTimestamp { get; set; }
 
                 /// <summary>
                 /// 获取或设置交易金额（单位：分）。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("total_cost")]
-                [System.Text.Json.Serialization.JsonPropertyName("total_cost")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("total_cost")]
                 public int TotalCost { get; set; }
 
                 /// <summary>
                 /// 获取或设置投诉发起时间戳。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("create_time")]
-                [System.Text.Json.Serialization.JsonPropertyName("create_time")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("create_time")]
                 public long ComplaintCreateTimestamp { get; set; }
 
                 /// <summary>
                 /// 获取或设置投诉状态过期时间戳。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("expire_time")]
-                [System.Text.Json.Serialization.JsonPropertyName("expire_time")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("expire_time")]
                 public long ComplaintStatusExpireTimestamp { get; set; }
 
                 /// <summary>
                 /// 获取或设置投诉进度列表。
                 /// </summary>
-                [Newtonsoft.Json.JsonProperty("history")]
-                [System.Text.Json.Serialization.JsonPropertyName("history")]
+                [Newtonsoft.Json.JsonIgnore]
+                [System.Text.Json.Serialization.JsonIgnore]
                 [System.Xml.Serialization.XmlElement("history", Type = typeof(Types.ComplaintHistory))]
                 public Types.ComplaintHistory[] ComplaintHistoryList { get; set; } = default!;
             }
         }
 
+        internal static class Converters
+        {
+            internal class EventPropertyComplaintHistoryListNewtonsoftJsonConverter : Newtonsoft.Json.JsonConverter<Types.EventData.Types.ComplaintHistory[]?>
+            {
+                public override bool CanWrite
+                {
+                    get { return false; }
+                }
+
+                public override Types.EventData.Types.ComplaintHistory[]? ReadJson(Newtonsoft.Json.JsonReader reader, Type objectType, Types.EventData.Types.ComplaintHistory[]? existingValue, bool hasExistingValue, Newtonsoft.Json.JsonSerializer serializer)
+                {
+                    /*
+                     * NOTICE:
+                     *   "history" 字段有时是对象形式，有时是数组形式。
+                     *   此转换器为了同时兼容这两种数据结构。
+                     */
+
+                    switch (reader.TokenType)
+                    {
+                        case Newtonsoft.Json.JsonToken.Null:
+                            {
+                                return existingValue;
+                            }
+
+                        case Newtonsoft.Json.JsonToken.StartArray:
+                            {
+                                return serializer.Deserialize<Types.EventData.Types.ComplaintHistory[]>(reader);
+                            }
+
+                        case Newtonsoft.Json.JsonToken.StartObject:
+                            {
+                                Types.EventData.Types.ComplaintHistory[] array = new Types.EventData.Types.ComplaintHistory[1];
+                                array[0] = serializer.Deserialize<Types.EventData.Types.ComplaintHistory>(reader)!;
+                                return array;
+                            }
+                    }
+
+                    throw new Newtonsoft.Json.JsonException();
+                }
+
+                public override void WriteJson(Newtonsoft.Json.JsonWriter writer, Types.EventData.Types.ComplaintHistory[]? value, Newtonsoft.Json.JsonSerializer serializer)
+                {
+                    throw new NotImplementedException();
+                }
+            }
+
+            internal class EventPropertyComplaintHistoryListSystemTextJsonConverter : System.Text.Json.Serialization.JsonConverter<Types.EventData.Types.ComplaintHistory[]?>
+            {
+                public override Types.EventData.Types.ComplaintHistory[]? Read(ref System.Text.Json.Utf8JsonReader reader, Type typeToConvert, System.Text.Json.JsonSerializerOptions options)
+                {
+                    /*
+                     * NOTICE:
+                     *   "history" 字段有时是对象形式，有时是数组形式。
+                     *   此转换器为了同时兼容这两种数据结构。
+                     */
+
+                    switch (reader.TokenType)
+                    {
+                        case System.Text.Json.JsonTokenType.Null:
+                            {
+                                return default;
+                            }
+
+                        case System.Text.Json.JsonTokenType.StartArray:
+                            {
+                                return System.Text.Json.JsonSerializer.Deserialize<Types.EventData.Types.ComplaintHistory[]>(ref reader, options);
+                            }
+
+                        case System.Text.Json.JsonTokenType.StartObject:
+                            {
+                                Types.EventData.Types.ComplaintHistory[] array = new Types.EventData.Types.ComplaintHistory[1];
+                                array[0] = System.Text.Json.JsonSerializer.Deserialize<Types.EventData.Types.ComplaintHistory>(ref reader, options)!;
+                                return array;
+                            }
+                    }
+
+                    throw new System.Text.Json.JsonException();
+                }
+
+                public override void Write(System.Text.Json.Utf8JsonWriter writer, Types.EventData.Types.ComplaintHistory[]? value, System.Text.Json.JsonSerializerOptions options)
+                {
+                    writer.WriteRawValue(System.Text.Json.JsonSerializer.Serialize(value, typeof(Types.EventData.Types.ComplaintHistory[]), options));
+                }
+            }
+        }
+
         /// <summary>
         /// 获取或设置事件数据。
         /// </summary>
-        [Newtonsoft.Json.JsonProperty("BussiCallBackInfo")]
-        [System.Text.Json.Serialization.JsonPropertyName("BussiCallBackInfo")]
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
         [System.Xml.Serialization.XmlElement("BussiCallBackInfo")]
         public Types.EventData EventData { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置小程序 AppId。
+        /// <para>等效于 <see cref="Types.EventData.AppId"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("appid")]
+        [System.Xml.Serialization.XmlIgnore]
+        public string AppId
+        {
+            get { return this.EventData?.AppId ?? default!; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.AppId = value!;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置事件通知类型。
+        /// <para>等效于 <see cref="Types.EventData.OptionType"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("option_type")]
+        [System.Text.Json.Serialization.JsonPropertyName("option_type")]
+        [System.Xml.Serialization.XmlIgnore]
+        public string OptionType
+        {
+            get { return this.EventData?.OptionType ?? default!; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.OptionType = value!;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置投诉单号。
+        /// <para>等效于 <see cref="Types.EventData.ComplaintOrderId"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("complaint_order_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("complaint_order_id")]
+        [System.Text.Json.Serialization.JsonNumberHandling(System.Text.Json.Serialization.JsonNumberHandling.AllowReadingFromString)]
+        [System.Xml.Serialization.XmlIgnore]
+        public long ComplaintOrderId
+        {
+            get { return this.EventData?.ComplaintOrderId ?? default; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.ComplaintOrderId = value;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置用户 OpenId。
+        /// <para>等效于 <see cref="Types.EventData.OpenId"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("open_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("open_id")]
+        [System.Xml.Serialization.XmlIgnore]
+        public string OpenId
+        {
+            get { return this.EventData?.OpenId ?? default!; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.OpenId = value!;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置投诉问题类型。
+        /// <para>等效于 <see cref="Types.EventData.Type"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("type")]
+        [System.Text.Json.Serialization.JsonPropertyName("type")]
+        [System.Text.Json.Serialization.JsonNumberHandling(System.Text.Json.Serialization.JsonNumberHandling.AllowReadingFromString)]
+        [System.Xml.Serialization.XmlIgnore]
+        public int Type
+        {
+            get { return this.EventData?.Type ?? default; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.Type = value;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置订单状态。
+        /// <para>等效于 <see cref="Types.EventData.Status"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("status")]
+        [System.Text.Json.Serialization.JsonPropertyName("status")]
+        [System.Text.Json.Serialization.JsonNumberHandling(System.Text.Json.Serialization.JsonNumberHandling.AllowReadingFromString)]
+        [System.Xml.Serialization.XmlIgnore]
+        public int Status
+        {
+            get { return this.EventData?.Status ?? default; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.Status = value;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置用户手机号码。
+        /// <para>等效于 <see cref="Types.EventData.PhoneNumber"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("phone_number")]
+        [System.Text.Json.Serialization.JsonPropertyName("phone_number")]
+        [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Serialization.Common.NumericalStringConverter))]
+        [System.Xml.Serialization.XmlIgnore]
+        public string PhoneNumber
+        {
+            get { return this.EventData?.PhoneNumber ?? default!; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.PhoneNumber = value!;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置投诉材料内容。
+        /// <para>等效于 <see cref="Types.EventData.CustomerMaterialContent"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("customer_material_content")]
+        [System.Text.Json.Serialization.JsonPropertyName("customer_material_content")]
+        [System.Xml.Serialization.XmlIgnore]
+        public string? CustomerMaterialContent
+        {
+            get { return this.EventData?.CustomerMaterialContent ?? default; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.CustomerMaterialContent = value;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置投诉材料图片 MediaId 列表字符串（以逗号分隔）。
+        /// <para>等效于 <see cref="Types.EventData.CustomerMaterialMediaIdListString"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("customer_material_media_id_list")]
+        [System.Text.Json.Serialization.JsonPropertyName("customer_material_media_id_list")]
+        [System.Xml.Serialization.XmlIgnore]
+        public string? CustomerMaterialMediaIdListString
+        {
+            get { return this.EventData?.CustomerMaterialMediaIdListString ?? default; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.CustomerMaterialMediaIdListString = value;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置订单号。
+        /// <para>等效于 <see cref="Types.EventData.OrderId"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("order_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("order_id")]
+        [System.Xml.Serialization.XmlIgnore]
+        public string OrderId
+        {
+            get { return this.EventData?.OrderId ?? default!; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.OrderId = value!;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置商户订单号。
+        /// <para>等效于 <see cref="Types.EventData.OutTradeNumber"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_trade_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+        [System.Xml.Serialization.XmlIgnore]
+        public string OutTradeNumber
+        {
+            get { return this.EventData?.OutTradeNumber ?? default!; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.OutTradeNumber = value!;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置商品名称。
+        /// <para>等效于 <see cref="Types.EventData.ProductName"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("product_name")]
+        [System.Text.Json.Serialization.JsonPropertyName("product_name")]
+        [System.Xml.Serialization.XmlIgnore]
+        public string ProductName
+        {
+            get { return this.EventData?.ProductName ?? default!; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.ProductName = value!;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置支付时间戳。
+        /// <para>等效于 <see cref="Types.EventData.PayTimestamp"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("pay_time")]
+        [System.Text.Json.Serialization.JsonPropertyName("pay_time")]
+        [System.Text.Json.Serialization.JsonNumberHandling(System.Text.Json.Serialization.JsonNumberHandling.AllowReadingFromString)]
+        [System.Xml.Serialization.XmlIgnore]
+        public long PayTimestamp
+        {
+            get { return this.EventData?.PayTimestamp ?? default; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.PayTimestamp = value;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置交易金额（单位：分）。
+        /// <para>等效于 <see cref="Types.EventData.TotalCost"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("total_cost")]
+        [System.Text.Json.Serialization.JsonPropertyName("total_cost")]
+        [System.Text.Json.Serialization.JsonNumberHandling(System.Text.Json.Serialization.JsonNumberHandling.AllowReadingFromString)]
+        [System.Xml.Serialization.XmlIgnore]
+        public int TotalCost
+        {
+            get { return this.EventData?.TotalCost ?? default; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.TotalCost = value;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置投诉发起时间戳。
+        /// <para>等效于 <see cref="Types.EventData.ComplaintCreateTimestamp"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("create_time")]
+        [System.Text.Json.Serialization.JsonPropertyName("create_time")]
+        [System.Text.Json.Serialization.JsonNumberHandling(System.Text.Json.Serialization.JsonNumberHandling.AllowReadingFromString)]
+        [System.Xml.Serialization.XmlIgnore]
+        public long ComplaintCreateTimestamp
+        {
+            get { return this.EventData?.ComplaintCreateTimestamp ?? default; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.ComplaintCreateTimestamp = value;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置投诉状态过期时间戳。
+        /// <para>等效于 <see cref="Types.EventData.ComplaintStatusExpireTimestamp"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("expire_time")]
+        [System.Text.Json.Serialization.JsonPropertyName("expire_time")]
+        [System.Text.Json.Serialization.JsonNumberHandling(System.Text.Json.Serialization.JsonNumberHandling.AllowReadingFromString)]
+        [System.Xml.Serialization.XmlIgnore]
+        public long ComplaintStatusExpireTimestamp
+        {
+            get { return this.EventData?.ComplaintStatusExpireTimestamp ?? default; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.ComplaintStatusExpireTimestamp = value;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置投诉进度列表。
+        /// <para>等效于 <see cref="Types.EventData.ComplaintHistory"/> </para>
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("history")]
+        [Newtonsoft.Json.JsonConverter(typeof(Converters.EventPropertyComplaintHistoryListNewtonsoftJsonConverter))]
+        [System.Text.Json.Serialization.JsonPropertyName("history")]
+        [System.Text.Json.Serialization.JsonConverter(typeof(Converters.EventPropertyComplaintHistoryListSystemTextJsonConverter))]
+        [System.Xml.Serialization.XmlIgnore]
+        public Types.EventData.Types.ComplaintHistory[] ComplaintHistoryList
+        {
+            get { return this.EventData?.ComplaintHistoryList ?? default!; }
+            set
+            {
+                EnsureEventDataInitialized();
+                this.EventData.ComplaintHistoryList = value!;
+            }
+        }
+
+        protected void EnsureEventDataInitialized()
+        {
+            if (this.EventData is null)
+            {
+                lock (_lockObj)
+                {
+                    if (this.EventData is null)
+                    {
+                        this.EventData = new Types.EventData();
+                    }
+                }
+            }
+        }
     }
 }
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/WxaMiniShop/ComplaintCallbackEvent.1.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/WxaMiniShop/ComplaintCallbackEvent.1.json
new file mode 100644
index 00000000..6af95108
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/WxaMiniShop/ComplaintCallbackEvent.1.json
@@ -0,0 +1,26 @@
+{
+    "ToUserName": "gh_adcbcb8bf3ba",
+    "FromUserName": "oR2XT5TrHrdQ1PBpMpEtJ3h9MU4",
+    "CreateTime": 1744244407,
+    "MsgType": "event",
+    "Event": "complaint callback",
+    "appid": "wxb6cb90b2dd",
+    "complaint_order_id": "2157",
+    "create_time": "1744244406",
+    "expire_time": "1744244406",
+    "history": {
+        "time": "1744244406",
+        "content": "content",
+        "media_id_list": []
+    },
+    "open_id": "oR2XT5Z70fuusMRK",
+    "option_type": "1",
+    "order_id": "payorder@_4200002656202",
+    "out_trade_no": "1909917325",
+    "pay_time": "1744194760",
+    "phone_number": "1396",
+    "product_name": "五",
+    "status": "201",
+    "total_cost": "5000",
+    "type": "643"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/WxaMiniShop/ComplaintCallbackEvent.2.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/WxaMiniShop/ComplaintCallbackEvent.2.json
new file mode 100644
index 00000000..f5a17dfa
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/EventSamples/WxaMiniShop/ComplaintCallbackEvent.2.json
@@ -0,0 +1,28 @@
+{
+    "ToUserName": "gh_adcbcb8bf3ba",
+    "FromUserName": "oR2XT5TrHrdQ1PBpMpEtJ3h9MU4",
+    "CreateTime": 1744244407,
+    "MsgType": "event",
+    "Event": "complaint callback",
+    "appid": "wxb6cb90b2dd",
+    "complaint_order_id": "2157",
+    "create_time": "1744244406",
+    "expire_time": "1744244406",
+    "history": [
+        {
+            "time": "1744244406",
+            "content": "content",
+            "media_id_list": []
+        }
+    ],
+    "open_id": "oR2XT5Z70fuusMRK",
+    "option_type": "1",
+    "order_id": "payorder@_4200002656202",
+    "out_trade_no": "1909917325",
+    "pay_time": "1744194760",
+    "phone_number": "1396",
+    "product_name": "五",
+    "status": "201",
+    "total_cost": "5000",
+    "type": "643"
+}