diff --git a/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientExecuteCgibinExternalPayExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientExecuteCgibinExternalPayExtensions.cs
index 41704bf4..9334febe 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientExecuteCgibinExternalPayExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientExecuteCgibinExternalPayExtensions.cs
@@ -113,5 +113,27 @@ namespace SKIT.FlurlHttpClient.Wechat.Work
             return await client.SendRequestWithJsonAsync<Models.CgibinExternalPayGetBillListResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
         }
         #endregion
+
+        #region Payment
+        /// <summary>
+        /// <para>异步调用 [POST] /cgi-bin/externalpay/get_payment_info 接口。</para>
+        /// <para>REF: https://developer.work.weixin.qq.com/document/path/95944 </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.CgibinExternalPayGetPaymentInfoResponse> ExecuteCgibinExternalPayGetPaymentInfoAsync(this WechatWorkClient client, Models.CgibinExternalPayGetPaymentInfoRequest 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", "externalpay", "get_payment_info")
+                .SetQueryParam("access_token", request.AccessToken);
+
+            return await client.SendRequestWithJsonAsync<Models.CgibinExternalPayGetPaymentInfoResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
+        #endregion
     }
 }
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoRequest.cs
new file mode 100644
index 00000000..72961346
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoRequest.cs
@@ -0,0 +1,15 @@
+namespace SKIT.FlurlHttpClient.Wechat.Work.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /cgi-bin/externalpay/get_payment_info 接口的请求。</para>
+    /// </summary>
+    public class CgibinExternalPayGetPaymentInfoRequest : WechatWorkRequest
+    {
+        /// <summary>
+        /// 获取或设置收款项目 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("payment_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("payment_id")]
+        public string PaymentId { get; set; } = string.Empty;
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoResponse.cs
new file mode 100644
index 00000000..11fcc195
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Work/Models/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoResponse.cs
@@ -0,0 +1,28 @@
+namespace SKIT.FlurlHttpClient.Wechat.Work.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /cgi-bin/externalpay/get_payment_info 接口的响应。</para>
+    /// </summary>
+    public class CgibinExternalPayGetPaymentInfoResponse : WechatWorkResponse
+    {
+        public static class Types
+        {
+            public class Bill
+            {
+                /// <summary>
+                /// 获取或设置商户单号。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("out_trade_no")]
+                [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+                public string OutTradeNumber { get; set; } = default!;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置收款单列表。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("bill_list")]
+        [System.Text.Json.Serialization.JsonPropertyName("bill_list")]
+        public Types.Bill[] BillList { get; set; } = default!;
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/ModelSamples/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoRequest.json b/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/ModelSamples/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoRequest.json
new file mode 100644
index 00000000..3b6269e9
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/ModelSamples/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoRequest.json
@@ -0,0 +1,3 @@
+{
+    "payment_id": "xxxx"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/ModelSamples/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoResponse.json b/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/ModelSamples/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoResponse.json
new file mode 100644
index 00000000..8c2619f7
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/ModelSamples/CgibinExternalPay/Payment/CgibinExternalPayGetPaymentInfoResponse.json
@@ -0,0 +1,12 @@
+{
+    "errcode": 0,
+    "errmsg": "ok",
+    "bill_list": [
+        {
+            "out_trade_no": "xxxx"
+        },
+        {
+            "out_trade_no": "yyyy"
+        }
+    ]
+}