diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/CombineTransactions/GetCombineTransactionByCombineOutTradeNumberResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/CombineTransactions/GetCombineTransactionByCombineOutTradeNumberResponse.cs
index 7d5ec205..a9cc7aef 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/CombineTransactions/GetCombineTransactionByCombineOutTradeNumberResponse.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/CombineTransactions/GetCombineTransactionByCombineOutTradeNumberResponse.cs
@@ -42,6 +42,13 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
                         [Newtonsoft.Json.JsonProperty("payer_currency")]
                         [System.Text.Json.Serialization.JsonPropertyName("payer_currency")]
                         public string PayerCurrency { get; set; } = default!;
+
+                        /// <summary>
+                        /// 获取或设置结算汇率（格式：外币兑换人民币的比例乘以 10 的 8 次方）。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("settlement_rate")]
+                        [System.Text.Json.Serialization.JsonPropertyName("settlement_rate")]
+                        public long? SettlementRate { get; set; }
                     }
                 }
 
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/EventSamples/_/CombineTransactions/CombineTransactionResource.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/EventSamples/_/CombineTransactions/CombineTransactionResource.json
index 8b0c5c2a..e6821d74 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/EventSamples/_/CombineTransactions/CombineTransactionResource.json
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/EventSamples/_/CombineTransactions/CombineTransactionResource.json
@@ -1,4 +1,4 @@
-{
+{
     "combine_appid": "wxd678efh567hg6787",
     "combine_out_trade_no": "20150806125346",
     "combine_mchid": "1900000109",
@@ -16,7 +16,8 @@
                 "total_amount": 10,
                 "currency": "CNY",
                 "payer_amount": 10,
-                "payer_currency": "CNY"
+                "payer_currency": "CNY",
+                "settlement_rate": 650000000
             },
             "success_time": "2015-05-20T13:29:35.120+08:00",
             "transaction_id": "1009660380201506130728806387",
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/CombineTransactions/GetCombineTransactionByCombineOutTradeNumberResponse.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/CombineTransactions/GetCombineTransactionByCombineOutTradeNumberResponse.json
index 9d80fab5..111373b7 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/CombineTransactions/GetCombineTransactionByCombineOutTradeNumberResponse.json
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/CombineTransactions/GetCombineTransactionByCombineOutTradeNumberResponse.json
@@ -1,4 +1,4 @@
-{
+{
     "combine_appid": "wxd678efh567hg6787",
     "combine_mchid": "1230000109",
     "combine_payer_info": {
@@ -16,7 +16,8 @@
                 "total_amount": 10,
                 "payer_amount": 10,
                 "currency": "CNY",
-                "payer_currency": "CNY"
+                "payer_currency": "CNY",
+                "settlement_rate": 650000000
             },
             "transaction_id": "1009660380201506130728806387",
             "out_trade_no": "20150806125346",