diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/Refund/CreateRefundDomesticRefundRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/Refund/CreateRefundDomesticRefundRequest.cs
index 11a98f0f..2eb8daff 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/Refund/CreateRefundDomesticRefundRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/Refund/CreateRefundDomesticRefundRequest.cs
@@ -1,4 +1,4 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 
 namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
 {
@@ -59,6 +59,13 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
                 [Newtonsoft.Json.JsonProperty("from")]
                 [System.Text.Json.Serialization.JsonPropertyName("from")]
                 public IList<Types.From>? FromList { get; set; }
+
+                /// <summary>
+                /// 获取或设置手续费退款金额（单位：分）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("refund_fee")]
+                [System.Text.Json.Serialization.JsonPropertyName("refund_fee")]
+                public int? RefundFee { get; set; }
             }
 
             public class GoodsDetail
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/Refund/GetRefundDomesticRefundByOutRefundNumberResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/Refund/GetRefundDomesticRefundByOutRefundNumberResponse.cs
index 5ebf78a4..bae27fd6 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/Refund/GetRefundDomesticRefundByOutRefundNumberResponse.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/Refund/GetRefundDomesticRefundByOutRefundNumberResponse.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 
 namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
 {
@@ -94,6 +94,13 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
                 [Newtonsoft.Json.JsonProperty("from")]
                 [System.Text.Json.Serialization.JsonPropertyName("from")]
                 public Types.From[]? FromList { get; set; }
+
+                /// <summary>
+                /// 获取或设置手续费退款金额（单位：分）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("refund_fee")]
+                [System.Text.Json.Serialization.JsonPropertyName("refund_fee")]
+                public int? RefundFee { get; set; }
             }
 
             public class Promotion