diff --git a/Admin.NET/Admin.NET.Core/Entity/SysWechatPay.cs b/Admin.NET/Admin.NET.Core/Entity/SysWechatPay.cs
index 62e5c127..aff68a15 100644
--- a/Admin.NET/Admin.NET.Core/Entity/SysWechatPay.cs
+++ b/Admin.NET/Admin.NET.Core/Entity/SysWechatPay.cs
@@ -11,8 +11,21 @@ namespace Admin.NET.Core;
 /// </summary>
 [SugarTable(null, "系统微信支付表")]
 [SysTable]
+[SugarIndex("sys_wechat_pay_order_id", nameof(OrderId), OrderByType.Desc)]
 public partial class SysWechatPay : EntityBase
 {
+    /// <summary>
+    /// 关联的商户订单号
+    /// </summary>
+    [SugarColumn(ColumnDescription = "OrderId")]
+    public virtual long OrderId { get; set; }
+
+    /// <summary>
+    /// 关联的商户订单状态(或者为第几次支付，有些订单涉及多次支付，比如先付预付款，后补尾款)
+    /// </summary>
+    [SugarColumn(ColumnDescription = "OrderStatus")]
+    public virtual int OrderStatus { get; set; }
+
     /// <summary>
     /// 微信商户号
     /// </summary>
@@ -154,7 +167,7 @@ public partial class SysWechatPay : EntityBase
     /// <summary>
     /// 子商户AppId
     /// </summary>
-    [SugarColumn(ColumnDescription = "回调通知地址")]
+    [SugarColumn(ColumnDescription = "子商户AppId")]
     public string? SubAppId { get; set; }
 
     /// <summary>
diff --git a/Admin.NET/Admin.NET.Core/Entity/SysWechatRefund.cs b/Admin.NET/Admin.NET.Core/Entity/SysWechatRefund.cs
new file mode 100644
index 00000000..8a309673
--- /dev/null
+++ b/Admin.NET/Admin.NET.Core/Entity/SysWechatRefund.cs
@@ -0,0 +1,121 @@
+// Admin.NET 项目的版权、商标、专利和其他相关权利均受相应法律法规的保护。使用本项目应遵守相关法律法规和许可证的要求。
+//
+// 本项目主要遵循 MIT 许可证和 Apache 许可证（版本 2.0）进行分发和使用。许可证位于源代码树根目录中的 LICENSE-MIT 和 LICENSE-APACHE 文件。
+//
+// 不得利用本项目从事危害国家安全、扰乱社会秩序、侵犯他人合法权益等法律法规禁止的活动！任何基于本项目二次开发而产生的一切法律纠纷和责任，我们不承担任何责任！
+
+namespace Admin.NET.Core;
+
+/// <summary>
+/// 微信退款表
+/// </summary>
+[SugarTable(null, "系统微信退款表")]
+[SysTable]
+[SugarIndex("sys_wechat_refund_order_id", nameof(OrderId), OrderByType.Desc)]
+public class SysWechatRefund : EntityBase
+{
+    /// <summary>
+    /// 微信支付订单号(原支付交易对应的微信订单号)
+    /// </summary>
+    [SugarColumn(ColumnDescription = "微信支付订单号", Length = 32)]
+    [Required]
+    public string TransactionId { get; set; }
+
+    /// <summary>
+    /// 商户订单号(原交易对应的商户付款单号)
+    /// </summary>
+    [SugarColumn(ColumnDescription = "商户付款单号", Length = 32)]
+    [Required]
+    public string OutTradeNumber { get; set; }
+
+    /// <summary>
+    /// 商户系统内部的退款单号，商户系统内部唯一，只能是数字、大小写字母_-|*@ ，同一退款单号多次请求只退一笔。
+    /// </summary>
+    [SugarColumn(ColumnDescription = "商户退款单号", Length = 64)]
+    [Required]
+    public string OutRefundNo { get; set; }
+
+    /// <summary> 
+    /// 退款原因，示例：商品已售完
+    /// </summary>
+    [SugarColumn(ColumnDescription = "退款原因", Length = 80)]
+    public string Reason { get; set; }
+
+    /// <summary>
+    /// 退款金额
+    /// </summary>
+    [SugarColumn(ColumnDescription = "退款金额")]
+    public int Refund { get; set; }
+
+    /// <summary>
+    /// 原订单总金额
+    /// </summary>
+    [SugarColumn(ColumnDescription = "订单总金额")]
+    public int Total { get; set; }
+
+    /// <summary>
+    /// 退款结果回调url
+    /// </summary>
+    [SugarColumn(ColumnDescription = "退款结果回调url", Length = 256)]
+    public string? NotifyUrl { get; set; }
+
+    /// <summary>
+    /// 退款资金来源, 可不传，默认使用未结算资金退款（仅对老资金流商户适用）
+    /// </summary>
+    [SugarColumn(ColumnDescription = "退款资金来源", Length = 32)]    
+    public string FundsAccount { get; set; }
+
+    /// <summary>
+    /// 关联的商户订单号
+    /// </summary>
+    [SugarColumn(ColumnDescription = "关联的用户订单号")]
+    public long OrderId { get; set; }
+
+    /// <summary>
+    /// 关联的商户订单状态(或者为第几次支付，有些订单涉及多次支付，比如先付预付款，后补尾款)
+    /// </summary>
+    [SugarColumn(ColumnDescription = "关联的商户订单状态")]
+    public int OrderStatus { get; set; }
+
+    /// <summary>
+    /// 关联的商户商品编码
+    /// </summary>
+    [SugarColumn(ColumnDescription = "关联的商户商品编码", Length = 32)]
+    public string MerchantGoodsId { get; set; }
+
+    /// <summary>
+    /// 关联的商户商品名称
+    /// </summary>
+    [SugarColumn(ColumnDescription = "关联的商户商品名称", Length = 256)]
+    public string GoodsName { get; set; }
+
+    /// <summary>
+    /// 关联的商户商品单价
+    /// </summary>
+    [SugarColumn(ColumnDescription = "关联的商户商品单价")]
+    public int UnitPrice { get; set; }
+
+    /// <summary>
+    /// 关联的商户商品退款金额
+    /// </summary>
+    [SugarColumn(ColumnDescription = "关联的商户商品退款金额")]
+    public int RefundAmount { get; set; }
+
+    /// <summary>
+    /// 关联的商户商品退货数量
+    /// </summary>
+    [SugarColumn(ColumnDescription = "关联的商户商品退货数量")]
+    public int RefundQuantity { get; set; } = 1;
+
+    /// <summary>
+    /// 附加数据
+    /// </summary>
+    [SugarColumn(ColumnDescription = "附加数据")]
+    public string? Attachment { get; set; }   
+
+    /// <summary>
+    /// 备注
+    /// </summary>
+    [SugarColumn(ColumnDescription = "备注")]
+    public string? Remark { get; set; }  
+}
\ No newline at end of file
diff --git a/Admin.NET/Admin.NET.Core/Service/Wechat/Dto/WechatPayInput.cs b/Admin.NET/Admin.NET.Core/Service/Wechat/Dto/WechatPayInput.cs
index 4d29621a..84fe10af 100644
--- a/Admin.NET/Admin.NET.Core/Service/Wechat/Dto/WechatPayInput.cs
+++ b/Admin.NET/Admin.NET.Core/Service/Wechat/Dto/WechatPayInput.cs
@@ -32,6 +32,16 @@ public class WechatPayTransactionInput
     /// 优惠标记
     /// </summary>
     public string GoodsTag { get; set; }
+
+    /// <summary>
+    /// 关联的商户订单号
+    /// </summary>
+    public long OrderId { get; set; }
+
+    /// <summary>
+    /// 关联的商户订单付款状态(或者为第几次支付，有些订单涉及多次支付，比如先付预付款，后补尾款)
+    /// </summary>
+    public int OrderStatus { get; set; } = 0;
 }
 
 public class WechatPayParaInput
@@ -40,4 +50,95 @@ public class WechatPayParaInput
     /// 订单Id
     /// </summary>
     public string PrepayId { get; set; }
+}
+
+
+public class RefundRequestInput // : WechatTenpayRequest
+{
+    /// <summary>
+    /// 商户订单号(原支付交易对应的付款单号)
+    /// </summary>
+    public string OutTradeNumber { get; set; }
+    ///// <summary>
+    ///// 退款单号
+    ///// </summary>
+    //public string OutRefundNumber { get; set; }
+    /// <summary>
+    /// 原订单金额(分)
+    /// </summary>
+    public int Total { get; set; }
+    /// <summary>
+    /// 退款金额(分)
+    /// </summary>
+    public int Refund { get; set; }
+    /// <summary>
+    /// 退款原因
+    /// </summary>
+    public string Reason { get; set; }
+    /// <summary>
+    /// 关联的商户订单号
+    /// </summary>
+    public long OrderId { get; set; }
+    /// <summary>
+    /// 关联的商户订单状态(或者为第几次支付，有些订单涉及多次支付，比如先付预付款，后补尾款)
+    /// </summary>
+    public int OrderStatus { get; set; }
+    /// <summary>
+    /// 关联的商户商品编码
+    /// </summary>
+    public string MerchantGoodsId { get; set; }
+    /// <summary>
+    /// 关联的商户商品名称
+    /// </summary>
+    public string GoodsName { get; set; }
+    /// <summary>
+    /// 关联的商户商品单价
+    /// </summary>
+    public int UnitPrice { get; set; } = 0;
+    /// <summary>
+    /// 关联的商户商品退款金额
+    /// </summary>
+    public int RefundAmount { get; set; } = 0;
+    /// <summary>
+    /// 关联的商户商品退货数量
+    /// </summary>
+    public int RefundQuantity { get; set; } = 1;
+    /// <summary>
+    /// 附加数据
+    /// </summary>
+    public string Attachment { get; set; }
+    /// <summary>
+    /// 备注
+    /// </summary>
+    public string Remark { get; set; }
+}
+
+public class PageSysWechatPayInput : BasePageInput
+{
+    /// <summary>
+    /// order_id
+    /// </summary>
+    /// <example></example>
+    public long? OrderId { get; set; } = -1;
+    /// <summary>
+    /// order_status
+    /// </summary>
+    /// <example></example>
+    public long? OrderStatus { get; set; } = -1;
+
+    /// <summary>
+    /// out_trade_number
+    /// </summary>
+    /// <example></example>
+    public string OutTradeNumber { get; set; }
+    /// <summary>
+    /// success_time范围
+    /// </summary>
+    /// <example></example>
+    public List<DateTime?> SuccessTimeRange { get; set; }
+    /// <summary>
+    /// expire_time范围
+    /// </summary>
+    /// <example></example>
+    public List<DateTime?> ExpireTimeRange { get; set; }
 }
\ No newline at end of file
diff --git a/Admin.NET/Admin.NET.Core/Service/Wechat/Dto/WechatPayOutput.cs b/Admin.NET/Admin.NET.Core/Service/Wechat/Dto/WechatPayOutput.cs
index b00e16aa..9a664e5d 100644
--- a/Admin.NET/Admin.NET.Core/Service/Wechat/Dto/WechatPayOutput.cs
+++ b/Admin.NET/Admin.NET.Core/Service/Wechat/Dto/WechatPayOutput.cs
@@ -12,19 +12,51 @@ public class WechatPayOutput
     /// OpenId
     /// </summary>
     public string OpenId { get; set; }
-
+    /// <summary>
+    /// 商户(支付交易)单号,微信唯一
+    /// </summary>
+    public string OutTradeNumber { get; set; }
+    /// <summary>
+    /// 关联的商户(商品交易)订单号
+    /// </summary>
+    public long OrderId { get; set; }
+    /// <summary>
+    /// 关联的商户订单状态(或者为第几次支付，有些订单涉及多次支付，比如先付预付款，后补尾款)
+    /// </summary>
+    public int OrderStatus { get; set; }
     /// <summary>
     /// 订单金额
     /// </summary>
     public int Total { get; set; }
-
     /// <summary>
     /// 附加数据
     /// </summary>
     public string Attachment { get; set; }
-
     /// <summary>
     /// 优惠标记
     /// </summary>
     public string GoodsTag { get; set; }
-}
\ No newline at end of file
+    /// <summary>
+    /// 支付发起时间
+    /// </summary>
+    public DateTimeOffset CreateTime { get; set; }
+    /// <summary>
+    /// 支付完成时间
+    /// </summary>
+    public DateTimeOffset SuccessTime { get; set; }
+    /// <summary>
+    /// 交易状态(支付成功后，微信返回)
+    /// </summary>
+    public string? TradeState { get; set; }
+
+    /// <summary>
+    /// 交易状态描述(支付成功后，微信返回)
+    /// </summary>
+    public string? TradeStateDescription { get; set; }
+}
+
+public class CreatePayTransactionOutput
+{
+    public string PrepayId { get; set; }
+    public string OutTradeNumber { get; set; }
+}
diff --git a/Admin.NET/Admin.NET.Core/Service/Wechat/SysWechatPayService.cs b/Admin.NET/Admin.NET.Core/Service/Wechat/SysWechatPayService.cs
index 957af35e..1a6d9360 100644
--- a/Admin.NET/Admin.NET.Core/Service/Wechat/SysWechatPayService.cs
+++ b/Admin.NET/Admin.NET.Core/Service/Wechat/SysWechatPayService.cs
@@ -12,18 +12,20 @@ namespace Admin.NET.Core.Service;
 [ApiDescriptionSettings(Order = 210)]
 public class SysWechatPayService : IDynamicApiController, ITransient
 {
-    private readonly SqlSugarRepository<SysWechatPay> _sysWechatPayUserRep;
-
+    private readonly SqlSugarRepository<SysWechatPay> _sysWechatPayRep;
+    private readonly SqlSugarRepository<SysWechatRefund> _sysWechatRefundRep;
     private readonly WechatPayOptions _wechatPayOptions;
     private readonly PayCallBackOptions _payCallBackOptions;
 
     private readonly WechatTenpayClient _wechatTenpayClient;
 
-    public SysWechatPayService(SqlSugarRepository<SysWechatPay> sysWechatPayUserRep,
-        IOptions<WechatPayOptions> wechatPayOptions,
-        IOptions<PayCallBackOptions> payCallBackOptions)
+    public SysWechatPayService(SqlSugarRepository<SysWechatPay> sysWechatPayRep
+        , SqlSugarRepository<SysWechatRefund> sysWechatRefundRep
+        , IOptions<WechatPayOptions> wechatPayOptions
+        , IOptions<PayCallBackOptions> payCallBackOptions)
     {
-        _sysWechatPayUserRep = sysWechatPayUserRep;
+        _sysWechatPayRep = sysWechatPayRep;
+        this._sysWechatRefundRep = sysWechatRefundRep;
         _wechatPayOptions = wechatPayOptions.Value;
         _payCallBackOptions = payCallBackOptions.Value;
 
@@ -64,11 +66,20 @@ public class SysWechatPayService : IDynamicApiController, ITransient
     /// 微信支付统一下单获取Id(商户直连) 🔖
     /// </summary>
     [DisplayName("微信支付统一下单获取Id(商户直连)")]
-    public async Task<dynamic> CreatePayTransaction([FromBody] WechatPayTransactionInput input)
+    public async Task<CreatePayTransactionOutput> CreatePayTransaction([FromBody] WechatPayTransactionInput input)
     {
+        string outTradeNumber = DateTimeOffset.Now.ToString("yyyyMMddHHmmssfff") + (new Random()).Next(100, 1000); // 微信需要的订单号(唯一)
+
+        //检查订单信息是否已存在(使用“商户交易单号+状态”唯一性判断)
+        var wechatPay = await _sysWechatPayRep.GetFirstAsync(u => u.OrderId == input.OrderId && u.OrderStatus == input.OrderStatus);
+        if (wechatPay != null)
+        {
+            outTradeNumber = wechatPay.OutTradeNumber;
+        }
+
         var request = new CreatePayTransactionJsapiRequest()
         {
-            OutTradeNumber = DateTimeOffset.Now.ToString("yyyyMMddHHmmssfff") + (new Random()).Next(100, 1000), // 订单号
+            OutTradeNumber = outTradeNumber,
             AppId = _wechatPayOptions.AppId,
             Description = input.Description,
             Attachment = input.Attachment,
@@ -80,27 +91,32 @@ public class SysWechatPayService : IDynamicApiController, ITransient
         };
         var response = await _wechatTenpayClient.ExecuteCreatePayTransactionJsapiAsync(request);
         if (!response.IsSuccessful())
-            throw Oops.Oh(response.ErrorMessage);
+            throw Oops.Oh<Exception>(response.ErrorMessage);
 
-        // 保存订单信息
-        var wechatPay = new SysWechatPay()
+        if (wechatPay == null)
         {
-            AppId = _wechatPayOptions.AppId,
-            MerchantId = _wechatPayOptions.MerchantId,
-            OutTradeNumber = request.OutTradeNumber,
-            Description = input.Description,
-            Attachment = input.Attachment,
-            GoodsTag = input.GoodsTag,
-            Total = input.Total,
-            OpenId = input.OpenId,
-            TransactionId = ""
-        };
-        await _sysWechatPayUserRep.InsertAsync(wechatPay);
+            // 保存订单信息
+            wechatPay = new SysWechatPay()
+            {
+                AppId = _wechatPayOptions.AppId,
+                MerchantId = _wechatPayOptions.MerchantId,
+                OutTradeNumber = request.OutTradeNumber,
+                Description = input.Description,
+                Attachment = input.Attachment,
+                GoodsTag = input.GoodsTag,
+                Total = input.Total,
+                OpenId = input.OpenId,
+                TransactionId = "",
+                OrderId = input.OrderId,
+                OrderStatus = input.OrderStatus
+            };
+            await _sysWechatPayRep.InsertAsync(wechatPay);
+        }
 
-        return new
+        return new CreatePayTransactionOutput
         {
-            response.PrepayId,
-            request.OutTradeNumber
+            PrepayId = response.PrepayId,
+            OutTradeNumber = request.OutTradeNumber
         };
     }
 
@@ -108,11 +124,20 @@ public class SysWechatPayService : IDynamicApiController, ITransient
     /// 微信支付统一下单获取Id(服务商模式) 🔖
     /// </summary>
     [DisplayName("微信支付统一下单获取Id(服务商模式)")]
-    public async Task<dynamic> CreatePayPartnerTransaction([FromBody] WechatPayTransactionInput input)
+    public async Task<CreatePayTransactionOutput> CreatePayPartnerTransaction([FromBody] WechatPayTransactionInput input)
     {
+        string outTradeNumber = DateTimeOffset.Now.ToString("yyyyMMddHHmmssfff") + (new Random()).Next(100, 1000); // 微信需要的订单号(唯一)
+
+        //检查订单信息是否已存在(使用“商户交易单号+状态”唯一性判断)
+        var wechatPay = await _sysWechatPayRep.GetFirstAsync(u => u.OrderId == input.OrderId && u.OrderStatus == input.OrderStatus);
+        if (wechatPay != null)
+        {
+            outTradeNumber = wechatPay.OutTradeNumber;
+        }
+
         var request = new CreatePayPartnerTransactionJsapiRequest()
         {
-            OutTradeNumber = DateTimeOffset.Now.ToString("yyyyMMddHHmmssfff") + (new Random()).Next(100, 1000), // 订单号
+            OutTradeNumber = outTradeNumber,
             AppId = _wechatPayOptions.AppId,
             MerchantId = _wechatPayOptions.MerchantId,
             SubAppId = _wechatPayOptions.AppId,
@@ -127,29 +152,31 @@ public class SysWechatPayService : IDynamicApiController, ITransient
         };
         var response = await _wechatTenpayClient.ExecuteCreatePayPartnerTransactionJsapiAsync(request);
         if (!response.IsSuccessful())
-            throw Oops.Oh(response.ErrorMessage);
-
-        // 保存订单信息
-        var wechatPay = new SysWechatPay()
+            throw Oops.Oh<Exception>($"JSAPI 下单失败（状态码：{response.GetRawStatus()}，错误代码：{response.ErrorCode}，错误描述：{response.ErrorMessage}）");
+        if (wechatPay == null)
         {
-            AppId = _wechatPayOptions.AppId,
-            MerchantId = _wechatPayOptions.MerchantId,
-            SubAppId = _wechatPayOptions.AppId,
-            SubMerchantId = _wechatPayOptions.MerchantId,
-            OutTradeNumber = request.OutTradeNumber,
-            Description = input.Description,
-            Attachment = input.Attachment,
-            GoodsTag = input.GoodsTag,
-            Total = input.Total,
-            OpenId = input.OpenId,
-            TransactionId = ""
-        };
-        await _sysWechatPayUserRep.InsertAsync(wechatPay);
+            // 保存订单信息
+            wechatPay = new SysWechatPay()
+            {
+                AppId = _wechatPayOptions.AppId,
+                MerchantId = _wechatPayOptions.MerchantId,
+                SubAppId = _wechatPayOptions.AppId,
+                SubMerchantId = _wechatPayOptions.MerchantId,
+                OutTradeNumber = request.OutTradeNumber,
+                Description = input.Description,
+                Attachment = input.Attachment,
+                GoodsTag = input.GoodsTag,
+                Total = input.Total,
+                OpenId = input.OpenId,
+                TransactionId = ""
+            };
+            await _sysWechatPayRep.InsertAsync(wechatPay);
+        }
 
-        return new
+        return new CreatePayTransactionOutput
         {
-            response.PrepayId,
-            request.OutTradeNumber
+            PrepayId = response.PrepayId,
+            OutTradeNumber = request.OutTradeNumber
         };
     }
 
@@ -161,7 +188,7 @@ public class SysWechatPayService : IDynamicApiController, ITransient
     [DisplayName("获取支付订单详情")]
     public async Task<SysWechatPay> GetPayInfo(string tradeId)
     {
-        return await _sysWechatPayUserRep.GetFirstAsync(u => u.OutTradeNumber == tradeId);
+        return await _sysWechatPayRep.GetFirstAsync(u => u.OutTradeNumber == tradeId);
     }
 
     /// <summary>
@@ -183,7 +210,7 @@ public class SysWechatPayService : IDynamicApiController, ITransient
             var callbackResource = _wechatTenpayClient.DecryptEventResource<TransactionResource>(callbackModel);
 
             // 修改订单支付状态
-            var wechatPay = await _sysWechatPayUserRep.GetFirstAsync(u => u.OutTradeNumber == callbackResource.OutTradeNumber
+            var wechatPay = await _sysWechatPayRep.GetFirstAsync(u => u.OutTradeNumber == callbackResource.OutTradeNumber
                 && u.MerchantId == callbackResource.MerchantId);
             if (wechatPay == null) return null;
             //wechatPay.OpenId = callbackResource.Payer.OpenId; // 支付者标识
@@ -198,7 +225,7 @@ public class SysWechatPayService : IDynamicApiController, ITransient
             wechatPay.PayerTotal = callbackResource.Amount.PayerTotal; // 用户支付金额
             wechatPay.SuccessTime = callbackResource.SuccessTime; // 支付完成时间
 
-            await _sysWechatPayUserRep.AsUpdateable(wechatPay).IgnoreColumns(true).ExecuteCommandAsync();
+            await _sysWechatPayRep.AsUpdateable(wechatPay).IgnoreColumns(true).ExecuteCommandAsync();
 
             return new WechatPayOutput()
             {
@@ -230,7 +257,7 @@ public class SysWechatPayService : IDynamicApiController, ITransient
             var callbackResource = _wechatTenpayClient.DecryptEventResource<PartnerTransactionResource>(callbackModel);
 
             // 修改订单支付状态
-            var wechatPay = await _sysWechatPayUserRep.GetFirstAsync(u => u.OutTradeNumber == callbackResource.OutTradeNumber
+            var wechatPay = await _sysWechatPayRep.GetFirstAsync(u => u.OutTradeNumber == callbackResource.OutTradeNumber
                 && u.MerchantId == callbackResource.MerchantId);
             if (wechatPay == null) return;
             //wechatPay.OpenId = callbackResource.Payer.OpenId; // 支付者标识
@@ -245,7 +272,187 @@ public class SysWechatPayService : IDynamicApiController, ITransient
             wechatPay.PayerTotal = callbackResource.Amount.PayerTotal; // 用户支付金额
             wechatPay.SuccessTime = callbackResource.SuccessTime; // 支付完成时间
 
-            await _sysWechatPayUserRep.AsUpdateable(wechatPay).IgnoreColumns(true).ExecuteCommandAsync();
+            await _sysWechatPayRep.AsUpdateable(wechatPay).IgnoreColumns(true).ExecuteCommandAsync();
         }
     }
+
+    /// <summary>
+    /// 退款申请
+    /// https://pay.weixin.qq.com/docs/merchant/apis/mini-program-payment/create.html
+    /// </summary>
+    /// <param name="input"></param>
+    /// <returns></returns>
+    [DisplayName("微信退款申请)")]
+    public async Task Refund(RefundRequestInput input)
+    {
+        var request = new CreateRefundDomesticRefundRequest()
+        {
+            OutTradeNumber = input.OutTradeNumber,
+            OutRefundNumber = "REFUND_" + DateTimeOffset.Now.ToString("yyyyMMddHHmmssfff"),
+            Amount = new CreateRefundDomesticRefundRequest.Types.Amount()
+            {
+                Total = input.Total,
+                Refund = input.Refund
+            },
+            Reason = input.Reason,
+        };
+        var response = await _wechatTenpayClient.ExecuteCreateRefundDomesticRefundAsync(request);
+
+        if (!response.IsSuccessful())
+            throw Oops.Oh<Exception>($"JSAPI 退款申请失败（状态码：{response.GetRawStatus()}，错误代码：{response.ErrorCode}，错误描述：{response.ErrorMessage}）");
+
+        var wechatRefund = await _sysWechatRefundRep.GetFirstAsync(u => u.OutTradeNumber == input.OutTradeNumber);
+        if (wechatRefund == null)
+        {
+            // 保存退款申请信息
+            wechatRefund = new SysWechatRefund()
+            {
+                TransactionId = input.OutTradeNumber,
+                OutTradeNumber = request.OutTradeNumber,
+                OutRefundNo = request.OutTradeNumber, //每笔付款只退一次，所以这里直接用付款单号
+                Reason = request.Reason,
+                Refund = input.Refund,
+                Total = input.Total,
+                //NotifyUrl = "",
+                OrderId = input.OrderId,
+                OrderStatus = input.OrderStatus,
+                MerchantGoodsId = input.MerchantGoodsId,
+                GoodsName = input.GoodsName,
+                UnitPrice = input.UnitPrice,
+                RefundAmount = input.RefundAmount,
+                RefundQuantity = input.RefundQuantity,
+                Attachment = input.Attachment,
+                Remark = input.Remark
+            };
+            await _sysWechatRefundRep.InsertAsync(wechatRefund);
+        }
+    }
+
+    /// <summary>
+    /// 查询单笔退款（通过商户退款单号）
+    /// https://pay.weixin.qq.com/docs/merchant/apis/mini-program-payment/query-by-out-refund-no.html
+    /// </summary>
+    /// <param name="outRefundNumber"></param>
+    /// <returns></returns>
+    [DisplayName("微信查询单笔退款)")]
+    public async Task<GetRefundDomesticRefundByOutRefundNumberResponse> GetRefundByOutRefundNumber(string outRefundNumber)
+    {
+        var request = new GetRefundDomesticRefundByOutRefundNumberRequest()
+        {
+            OutRefundNumber = outRefundNumber
+        };
+        return await _wechatTenpayClient.ExecuteGetRefundDomesticRefundByOutRefundNumberAsync(request);
+    }
+
+    /// <summary>
+    /// 微信支付订单号查询(校正)
+    /// https://api.mch.weixin.qq.com/v3/pay/transactions/id/{transaction_id}
+    /// </summary>
+    /// <param name="transactionId"></param>
+    /// <returns></returns>
+    [DisplayName("微信支付订单号查询(校正)")]
+    public async Task<WechatPayOutput> GetPayTransactionByIdAsync(string transactionId)
+    {
+        var request = new GetPayTransactionByIdRequest()
+        {
+            MerchantId = _wechatPayOptions.MerchantId,
+            TransactionId = transactionId,
+            WechatpayCertificateSerialNumber = _wechatPayOptions.MerchantCertificateSerialNumber
+        };
+        var response = await _wechatTenpayClient.ExecuteGetPayTransactionByIdAsync(request);
+        if (response.TradeState == "SUCCESS")
+        {
+            // 修正订单支付状态
+            var wechatPay = await _sysWechatPayRep.GetFirstAsync(u => u.TransactionId == transactionId && u.MerchantId == request.MerchantId);
+            if (wechatPay != null && string.IsNullOrEmpty(wechatPay.TradeState))
+            {
+                wechatPay.TransactionId = response.TransactionId; // 支付订单号
+                wechatPay.TradeType = response.TradeType; // 交易类型
+                wechatPay.TradeState = response.TradeState; // 交易状态
+                wechatPay.TradeStateDescription = response.TradeStateDescription; // 交易状态描述
+                wechatPay.BankType = response.BankType; // 付款银行类型
+                wechatPay.Total = response.Amount.Total; // 订单总金额
+                wechatPay.PayerTotal = response.Amount.PayerTotal; // 用户支付金额
+                wechatPay.SuccessTime = response.SuccessTime; // 支付完成时间
+
+                await _sysWechatPayRep.AsUpdateable(wechatPay).IgnoreColumns(true).ExecuteCommandAsync();
+                return wechatPay.Adapt<WechatPayOutput>();
+            }
+        }
+        return response.Adapt<WechatPayOutput>();
+    }
+
+    /// <summary>
+    /// 商户订单号查询(校正)
+    ///  https://api.mch.weixin.qq.com/v3/pay/transactions/out-trade-no/{out_trade_no}
+    /// </summary>
+    /// <param name="outTradeNumber"></param>
+    /// <returns></returns>
+    [DisplayName("微信商户订单号查询(校正)")]
+    public async Task<WechatPayOutput> GetPayTransactionByOutTradeNumberAsync(string outTradeNumber)
+    {
+        var request = new GetPayTransactionByOutTradeNumberRequest()
+        {
+            MerchantId = _wechatPayOptions.MerchantId,
+            OutTradeNumber = outTradeNumber,
+            WechatpayCertificateSerialNumber = _wechatPayOptions.MerchantCertificateSerialNumber
+        };
+        var response = await _wechatTenpayClient.ExecuteGetPayTransactionByOutTradeNumberAsync(request);
+        if (response.TradeState == "SUCCESS")
+        {
+            // 修正订单支付状态
+            var wechatPay = await _sysWechatPayRep.GetFirstAsync(u => u.OutTradeNumber == outTradeNumber && u.MerchantId == request.MerchantId);
+            if (wechatPay != null && string.IsNullOrEmpty(wechatPay.TradeState))
+            {
+                wechatPay.TransactionId = response.TransactionId; // 支付订单号
+                wechatPay.TradeType = response.TradeType; // 交易类型
+                wechatPay.TradeState = response.TradeState; // 交易状态
+                wechatPay.TradeStateDescription = response.TradeStateDescription; // 交易状态描述
+                wechatPay.BankType = response.BankType; // 付款银行类型
+                wechatPay.Total = response.Amount.Total; // 订单总金额
+                wechatPay.PayerTotal = response.Amount.PayerTotal; // 用户支付金额
+                wechatPay.SuccessTime = response.SuccessTime; // 支付完成时间               
+                await _sysWechatPayRep.AsUpdateable(wechatPay).IgnoreColumns(true).ExecuteCommandAsync();
+                return wechatPay.Adapt<WechatPayOutput>();
+            }
+        }
+        return response.Adapt<WechatPayOutput>();
+    }
+
+    /// <summary>
+    /// 获取支付记录列表(分页)
+    /// </summary>
+    /// <param name="input">PageSysWechatPayInput</param>
+    /// <returns></returns>
+    [DisplayName("获取支付记录列表(分页)")]
+    public async Task<SqlSugarPagedList<SysWechatPay>> PageAsync(PageSysWechatPayInput input)
+    {
+        var query = _sysWechatPayRep.AsQueryable()
+            .WhereIF(input.OrderId > 0, u => u.OrderId == input.OrderId)
+            .WhereIF(input.OrderStatus > 0, u => u.OrderStatus == input.OrderStatus)
+            .WhereIF(!string.IsNullOrWhiteSpace(input.OutTradeNumber), u => u.OutTradeNumber.Contains(input.OutTradeNumber.Trim()));
+
+        if (input.SuccessTimeRange != null && input.SuccessTimeRange.Count > 0)
+        {
+            DateTime? start = input.SuccessTimeRange[0];
+            query = query.WhereIF(start.HasValue, u => u.SuccessTime > start);
+            if (input.SuccessTimeRange.Count > 1 && input.SuccessTimeRange[1].HasValue)
+            {
+                var end = input.SuccessTimeRange[1].Value.AddDays(1);
+                query = query.Where(u => u.SuccessTime < end);
+            }
+        }
+        if (input.ExpireTimeRange != null && input.ExpireTimeRange.Count > 0)
+        {
+            DateTime? start = input.ExpireTimeRange[0];
+            query = query.WhereIF(start.HasValue, u => u.ExpireTime > start);
+            if (input.ExpireTimeRange.Count > 1 && input.ExpireTimeRange[1].HasValue)
+            {
+                var end = input.ExpireTimeRange[1].Value.AddDays(1);
+                query = query.Where(u => u.ExpireTime < end);
+            }
+        }
+        query = query.OrderByDescending(u => u.CreateTime);
+        return await query.ToPagedListAsync(input.Page, input.PageSize);
+    }
 }
\ No newline at end of file