diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Product/Coupon/ProductCouponCreateRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Product/Coupon/ProductCouponCreateRequest.cs
index b5e034bf..09d8f971 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Product/Coupon/ProductCouponCreateRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Product/Coupon/ProductCouponCreateRequest.cs
@@ -155,6 +155,13 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Models
                 [System.Text.Json.Serialization.JsonPropertyName("valid_day_num")]
                 public int? ValidDays { get; set; }
 
+                /// <summary>
+                /// 获取或设置相对生效秒数。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("valid_second")]
+                [System.Text.Json.Serialization.JsonPropertyName("valid_second")]
+                public int? ValidSeconds { get; set; }
+
                 /// <summary>
                 /// 获取或设置绝对生效开始时间戳。
                 /// </summary>
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Shop/Coupon/ShopCouponGetResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Shop/Coupon/ShopCouponGetResponse.cs
index b377d24c..11e63f33 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Shop/Coupon/ShopCouponGetResponse.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Shop/Coupon/ShopCouponGetResponse.cs
@@ -212,6 +212,13 @@
                                         [System.Text.Json.Serialization.JsonPropertyName("valid_day_num")]
                                         public int? ValidDays { get; set; }
 
+                                        /// <summary>
+                                        /// 获取或设置相对生效秒数。
+                                        /// </summary>
+                                        [Newtonsoft.Json.JsonProperty("valid_second")]
+                                        [System.Text.Json.Serialization.JsonPropertyName("valid_second")]
+                                        public int? ValidSeconds { get; set; }
+
                                         /// <summary>
                                         /// 获取或设置绝对生效开始时间戳。
                                         /// </summary>
@@ -226,6 +233,16 @@
                                         [System.Text.Json.Serialization.JsonPropertyName("end_time")]
                                         public long? EndTimestamp { get; set; }
                                     }
+
+                                    public class Extra
+                                    {
+                                        /// <summary>
+                                        /// 获取或设置有效期时间戳。
+                                        /// </summary>
+                                        [Newtonsoft.Json.JsonProperty("valid_time")]
+                                        [System.Text.Json.Serialization.JsonPropertyName("valid_time")]
+                                        public long? ValidTimestamp { get; set; }
+                                    }
                                 }
 
                                 /// <summary>
@@ -261,7 +278,14 @@
                                 /// </summary>
                                 [Newtonsoft.Json.JsonProperty("valid_info")]
                                 [System.Text.Json.Serialization.JsonPropertyName("valid_info")]
-                                public Types.Validity Validity { get; set; } = default!;
+                                public Types.Validity? Validity { get; set; }
+
+                                /// <summary>
+                                /// 获取或设置优惠券扩展信息。
+                                /// </summary>
+                                [Newtonsoft.Json.JsonProperty("ext_info")]
+                                [System.Text.Json.Serialization.JsonPropertyName("ext_info")]
+                                public Types.Extra? Extra { get; set; }
                             }
                         }
 
@@ -272,6 +296,13 @@
                         [System.Text.Json.Serialization.JsonPropertyName("out_coupon_id")]
                         public string OutCouponId { get; set; } = default!;
 
+                        /// <summary>
+                        /// 获取或设置小程序 AppId。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("appid")]
+                        [System.Text.Json.Serialization.JsonPropertyName("appid")]
+                        public string? AppId { get; set; }
+
                         /// <summary>
                         /// 获取或设置优惠券类型。
                         /// </summary>
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponAddRequest.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponAddRequest.json
index e85fbb7c..a837c921 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponAddRequest.json
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponAddRequest.json
@@ -42,8 +42,9 @@
             "valid_info": {
                 "valid_type": 1,
                 "valid_day_num": 10,
-                "start_time": "1625451250",
-                "end_time": "1625464250"
+                "valid_second": 3600,
+                "start_time": 1625451250,
+                "end_time": 1625464250
             }
         }
     }
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponGetListResponse.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponGetListResponse.json
index cd6d8c3a..7d2e044c 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponGetListResponse.json
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponGetListResponse.json
@@ -15,11 +15,15 @@
                     },
                     "receive_info": {
                         "total_num": 100
+                    },
+                    "ext_info": {
+                        "valid_time": 1625226181
                     }
                 },
                 "status": 0,
                 "create_time": 1625218450,
-                "update_time": 1625238573
+                "update_time": 1625238573,
+                "appid": "wx9e20708660a0991b"
             },
             "coupon_stock": {
                 "out_coupon_id": "out_coupon_id_3",
@@ -48,7 +52,8 @@
                 },
                 "status": 1,
                 "create_time": 1625239595,
-                "update_time": 1625239595
+                "update_time": 1625239595,
+                "appid": "wx9e20708660a0991b"
             }
         },
         {
@@ -92,13 +97,18 @@
                     "valid_info": {
                         "valid_type": 1,
                         "valid_day_num": 10,
+                        "valid_second": 3600,
                         "start_time": 1625451250,
                         "end_time": 1625464250
+                    },
+                    "ext_info": {
+                        "valid_time": 1625473652
                     }
                 },
                 "status": 2,
                 "create_time": 1625454641,
-                "update_time": 1625473652
+                "update_time": 1625473652,
+                "appid": "wx9e20708660a0991b"
             },
             "coupon_stock": {
                 "out_coupon_id": "coupon_id_1",
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponGetResponse.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponGetResponse.json
index 3f22c212..fb608674 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponGetResponse.json
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponGetResponse.json
@@ -26,7 +26,7 @@
                             "buy_out_product_id": "product_id_1",
                             "buy_product_cnt": 3,
                             "get_out_product_id": "product_id_2",
-                            "get_product_cnt": 2131241242
+                            "get_product_cnt": 5
                         }
                     },
                     "discount_num": 9800,
@@ -41,13 +41,15 @@
                 "valid_info": {
                     "valid_type": 1,
                     "valid_day_num": 10,
+                    "valid_second": 3600,
                     "start_time": 1625451250,
                     "end_time": 1625464250
                 }
             },
             "status": 1,
             "create_time": 1625454641,
-            "update_time": 1625454641
+            "update_time": 1625454641,
+            "appid": "wx9e20708660a0991b"
         }
     }
 }
\ No newline at end of file
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponUpdateRequest.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponUpdateRequest.json
index 63af756d..f51e60c5 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponUpdateRequest.json
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/Coupon/ShopCouponUpdateRequest.json
@@ -39,6 +39,7 @@
             "valid_info": {
                 "valid_type": 1,
                 "valid_day_num": 10,
+                "valid_second": 3600,
                 "start_time": 1625451250,
                 "end_time": 1625464250
             }