diff --git a/YD_Event.Application/Event/Dtos/UserCompetitionDtos.cs b/YD_Event.Application/Event/Dtos/UserCompetitionDtos.cs
index e4a746a..6e93843 100644
--- a/YD_Event.Application/Event/Dtos/UserCompetitionDtos.cs
+++ b/YD_Event.Application/Event/Dtos/UserCompetitionDtos.cs
@@ -905,11 +905,7 @@ public class UploadVoucherInput
     [Required]
     public DateTime PayTime { get; set; }
 
-    /// <summary>
-    /// 支付渠道 (微信/支付宝/银行转账)
-    /// </summary>
-    [Required]
-    public string PayChannel { get; set; }
+    
 
     /// <summary>
     /// 交易流水号 (可选)
diff --git a/YD_Event.Application/Event/EventArrangementService.cs b/YD_Event.Application/Event/EventArrangementService.cs
index ce86e51..80fffc6 100644
--- a/YD_Event.Application/Event/EventArrangementService.cs
+++ b/YD_Event.Application/Event/EventArrangementService.cs
@@ -38,7 +38,9 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
         _eventInfoRepository = eventInfoRepository;
     }
 
-    // 格式化时长显示（符号格式：X'X"）
+    /// <summary>
+    /// 格式化时长显示（符号格式：X'X"）
+    /// </summary>
     private string FormatDurationSymbol(int totalSeconds)
     {
         if (totalSeconds <= 0)
@@ -88,20 +90,19 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
         var eventProjects = await _eventProjectRepository.GetListAsync(x => x.EventId == eventId);
         var projectIds = eventProjects.Select(x => x.ProjectId).Distinct().ToList();
         var projects = await _projectRepository.GetListAsync(x => projectIds.Contains(x.Id));
-        
+
         // 按照 SortIndex 对 projects 排序
         var sortedProjects = projects.OrderBy(x => x.SortIndex).ToList();
-        
+
         var groups = await _groupRepository.GetListAsync(x => projectIds.Contains(x.ProjectId));
 
         // 统计各组别报名人数（统计所有非取消状态的报名，并且只统计运动员
         var counts = await _personRepository.AsQueryable()
             .InnerJoin<EventRegistration>((p, r) => p.RegistrationId == r.Id)
-            .Where((p, r) => r.EventId == eventId 
+            .Where((p, r) => r.EventId == eventId
                 && r.PaymentStatus != 4 // 排除已取消的报名
                 && !p.DeleteMark // 排除已删除的人员
-                && p.PersonType == PersonType.Athlete // 只统计运动员
-            )
+                && p.PersonType == PersonType.Athlete) // 只统计运动员
             .GroupBy((p, r) => new { p.ProjectId, p.GroupName })
             .Select((p, r) => new { p.ProjectId, p.GroupName, Count = SqlFunc.AggregateCount(p.Id) })
             .ToListAsync();
@@ -109,9 +110,9 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
         // 获取所有相关的人员和报名记录（用于统计团队数）
         var personWithTeam = await _personRepository.AsQueryable()
             .InnerJoin<EventRegistration>((p, r) => p.RegistrationId == r.Id)
-            .Where((p, r) => r.EventId == eventId 
-                && r.PaymentStatus != 4 
-                && !p.DeleteMark 
+            .Where((p, r) => r.EventId == eventId
+                && r.PaymentStatus != 4
+                && !p.DeleteMark
                 && p.PersonType == PersonType.Athlete
                 && r.TeamName != null)
             .Select((p, r) => new { p.ProjectId, p.GroupName, r.TeamName })
@@ -136,7 +137,7 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
                 ProjectId = eventProj.Id,
                 ProjectName = proj.Name,
                 ProjectType = proj.ProjectType.Description(),
-                DurationSeconds = proj.DurationSeconds,
+                DurationSeconds = proj.GetTotalDurationInSeconds(),
                 VenueCount = proj.VenueCount,
                 SortIndex = proj.SortIndex,
                 Groups = new List<ArrangementGroupDto>()
@@ -146,18 +147,18 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
             foreach (var group in projGroups)
             {
                 var countObj = counts.FirstOrDefault(c => c.ProjectId == eventProj.Id && c.GroupName == group.GroupName);
-                dto.Groups.Add(new ArrangementGroupDto 
-                { 
-                    GroupName = group.GroupName, 
-                    ParticipantCount = countObj?.Count ?? 0 
+                dto.Groups.Add(new ArrangementGroupDto
+                {
+                    GroupName = group.GroupName,
+                    ParticipantCount = countObj?.Count ?? 0
                 });
             }
-            
+
             // 根据项目类型计算总时长
             int venueCount = proj.VenueCount > 0 ? proj.VenueCount : 1;
             int totalParticipants = dto.Groups.Sum(g => g.ParticipantCount);
             int totalTeams = 0;
-            
+
             // 如果是团队项目，计算团队总数
             if (proj.IsTeamProject())
             {
@@ -189,16 +190,16 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
                 // 团队项目：(队伍数 ÷ 场地数) × 项目时长
                 int teamCount = totalTeams > 0 ? totalTeams : 1;
                 int rounds = (int)Math.Ceiling((double)teamCount / venueCount);
-                totalDurationSeconds = rounds * proj.DurationSeconds;
+                totalDurationSeconds = rounds * proj.GetTotalDurationInSeconds();
             }
             else
             {
                 // 个人项目：(报名人数 ÷ 场地数) × 项目时长
                 int participantCount = totalParticipants > 0 ? totalParticipants : 1;
                 int rounds = (int)Math.Ceiling((double)participantCount / venueCount);
-                totalDurationSeconds = rounds * proj.DurationSeconds;
+                totalDurationSeconds = rounds * proj.GetTotalDurationInSeconds();
             }
-            
+
             // 设置总时长秒数和分钟数
             dto.TotalDurationSeconds = totalDurationSeconds;
             dto.TotalDurationMinutes = (int)Math.Ceiling((double)totalDurationSeconds / 60);
@@ -223,13 +224,14 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
             var ep = eventProjects.FirstOrDefault(x => x.Id == setting.ProjectId);
             if (ep != null)
             {
-                await _projectRepository.UpdateAsync(x => new YD_Event.Core.Entities.Project
-                { 
-                    VenueCount = setting.VenueCount, 
-                    SortIndex = setting.SortIndex,
-                    DurationSeconds = setting.DurationSeconds,
-                    DurationMinutes = setting.DurationSeconds / 60
-                }, x => x.Id == ep.ProjectId);
+                var project = await _projectRepository.GetByIdAsync(ep.ProjectId);
+                if (project != null)
+                {
+                    project.VenueCount = setting.VenueCount;
+                    project.SortIndex = setting.SortIndex;
+                    project.SetTotalDurationInSeconds(setting.DurationSeconds);
+                    await _projectRepository.UpdateAsync(project);
+                }
             }
         }
     }
@@ -244,7 +246,7 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
         var eventProjects = await _eventProjectRepository.GetListAsync(x => x.EventId == eventId);
         var projectIds = eventProjects.Select(x => x.ProjectId).Distinct().ToList();
         var projects = await _projectRepository.GetListAsync(x => projectIds.Contains(x.Id));
-        
+
         // 按照 SortIndex 对 projects 排序
         var sortedProjects = projects.OrderBy(x => x.SortIndex).ToList();
         var groups = await _groupRepository.GetListAsync(x => projectIds.Contains(x.ProjectId));
@@ -252,9 +254,9 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
         // 统计各组别报名人数
         var counts = await _personRepository.AsQueryable()
             .InnerJoin<EventRegistration>((p, r) => p.RegistrationId == r.Id)
-            .Where((p, r) => r.EventId == eventId 
-                && r.PaymentStatus != 4 
-                && !p.DeleteMark 
+            .Where((p, r) => r.EventId == eventId
+                && r.PaymentStatus != 4
+                && !p.DeleteMark
                 && p.PersonType == PersonType.Athlete)
             .GroupBy((p, r) => new { p.ProjectId, p.GroupName })
             .Select((p, r) => new { p.ProjectId, p.GroupName, Count = SqlFunc.AggregateCount(p.Id) })
@@ -263,9 +265,9 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
         // 获取团队数
         var personWithTeam = await _personRepository.AsQueryable()
             .InnerJoin<EventRegistration>((p, r) => p.RegistrationId == r.Id)
-            .Where((p, r) => r.EventId == eventId 
-                && r.PaymentStatus != 4 
-                && !p.DeleteMark 
+            .Where((p, r) => r.EventId == eventId
+                && r.PaymentStatus != 4
+                && !p.DeleteMark
                 && p.PersonType == PersonType.Athlete
                 && r.TeamName != null)
             .Select((p, r) => new { p.ProjectId, p.GroupName, r.TeamName })
@@ -278,27 +280,29 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
             .ToList();
 
         var result = new List<ArrangementPreviewOutput>();
-        
-        // 2. 生成排期 - 按照排序后的项目顺序
+
+        // 2. 生成排期 - 按照排序后的项目顺序处理
         foreach (var proj in sortedProjects)
         {
             var eventProj = eventProjects.FirstOrDefault(x => x.ProjectId == proj.Id);
             if (eventProj == null) continue;
 
             int venueCount = proj.VenueCount > 0 ? proj.VenueCount : 1;
-            
+
             // 获取参赛人员
             var persons = await _personRepository.AsQueryable()
                 .InnerJoin<EventRegistration>((p, r) => p.RegistrationId == r.Id)
-                .Where((p, r) => p.ProjectId == eventProj.Id 
-                    && r.PaymentStatus != 4 
-                    && !p.DeleteMark 
+                .Where((p, r) => p.ProjectId == eventProj.Id
+                    && r.PaymentStatus != 4
+                    && !p.DeleteMark
                     && p.PersonType == PersonType.Athlete)
                 .OrderBy(p => p.GroupName)
                 .OrderBy(p => p.Id)
-                .Select((p, r) => new { 
-                    p.Name, p.GroupName, r.TeamName, 
-                    Duration = proj.DurationSeconds 
+                .Select((p, r) => new {
+                    p.Name,
+                    p.GroupName,
+                    r.TeamName,
+                    Duration = proj.GetTotalDurationInSeconds()
                 })
                 .ToListAsync();
 
@@ -326,13 +330,13 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
             {
                 int teamCount = totalTeams > 0 ? totalTeams : 1;
                 int rounds = (int)Math.Ceiling((double)teamCount / venueCount);
-                projectTotalDurationSeconds = rounds * proj.DurationSeconds;
+                projectTotalDurationSeconds = rounds * proj.GetTotalDurationInSeconds();
             }
             else
             {
                 int participantCount = totalParticipants > 0 ? totalParticipants : 1;
                 int rounds = (int)Math.Ceiling((double)participantCount / venueCount);
-                projectTotalDurationSeconds = rounds * proj.DurationSeconds;
+                projectTotalDurationSeconds = rounds * proj.GetTotalDurationInSeconds();
             }
 
             string projectTotalDuration = FormatDurationSymbol(projectTotalDurationSeconds);
@@ -340,12 +344,12 @@ public class EventArrangementService : BaseService<YD_Event.Core.Entities.Projec
             // 分组逻辑
             int currentRound = 1;
             int currentVenue = 1;
-            
+
             foreach (var person in persons)
             {
                 result.Add(new ArrangementPreviewOutput
                 {
-                    TimeRange = $"{proj.DurationSeconds}''", 
+                    TimeRange = $"{proj.GetTotalDurationInSeconds()}''",
                     ProjectName = proj.Name,
                     ProjectType = proj.ProjectType.Description(),
                     GroupName = person.GroupName,
diff --git a/YD_Event.Application/Event/UserEventRecordService.cs b/YD_Event.Application/Event/UserEventRecordService.cs
index 723d2d9..8ed66a7 100644
--- a/YD_Event.Application/Event/UserEventRecordService.cs
+++ b/YD_Event.Application/Event/UserEventRecordService.cs
@@ -273,14 +273,12 @@ public class UserEventRecordService : IDynamicApiController, ITransient
         var registration = await _registrationRepository.GetFirstAsync(x => x.Id == registrationId && x.CreatedUserId == userId);
         if (registration == null) throw Oops.Bah("报名记录不存在");
 
-        // 仅 status = 待付款 允许上传
-        if (registration.PaymentStatus != 0) throw Oops.Bah("当前状态不允许上传凭证");
+
 
         var uploadResult = await _fileService.Upload(input.File);
         var fileInfo = uploadResult.First();
 
         registration.PaymentProofUrl = fileInfo.Url;
-        registration.PaymentStatus = 0;
         registration.UpdatedTime = DateTime.Now;
         await _registrationRepository.UpdateAsync(registration);
 
diff --git a/YD_Event.Application/Order/Dtos/OrderListOutput.cs b/YD_Event.Application/Order/Dtos/OrderListOutput.cs
index 3c41889..ab5c715 100644
--- a/YD_Event.Application/Order/Dtos/OrderListOutput.cs
+++ b/YD_Event.Application/Order/Dtos/OrderListOutput.cs
@@ -116,6 +116,16 @@ public class OrderListOutput
     /// 退款时间
     /// </summary>
     public DateTime? RefundTime { get; set; }
+
+    /// <summary>
+    /// 关联原始订单的实付金额（仅退款订单时有效）
+    /// </summary>
+    public decimal? RelatedOrderActualAmount { get; set; }
+
+    /// <summary>
+    /// 是否为退款订单
+    /// </summary>
+    public bool IsRefundOrder { get; set; }
 }
 
 /// <summary>
@@ -237,6 +247,16 @@ public class OrderDetailOutput
     /// 联系人电话
     /// </summary>
     public string ContactPhone { get; set; }
+
+    /// <summary>
+    /// 关联原始订单的实付金额（仅退款订单时有效）
+    /// </summary>
+    public decimal? RelatedOrderActualAmount { get; set; }
+
+    /// <summary>
+    /// 是否为退款订单
+    /// </summary>
+    public bool IsRefundOrder { get; set; }
 }
 
 /// <summary>
diff --git a/YD_Event.Application/Order/OrderService.cs b/YD_Event.Application/Order/OrderService.cs
index 5108507..fda4b3a 100644
--- a/YD_Event.Application/Order/OrderService.cs
+++ b/YD_Event.Application/Order/OrderService.cs
@@ -231,7 +231,9 @@ public class OrderService : BaseService<YD_Event.Core.Entities.Order>, ITransien
                 CreatedTime = o.CreatedTime,
                 PaymentTime = o.PaymentTime,
                 RefundAmount = o.OrderType == 2 ? o.ActualAmount : 0, // 如果是退款订单，ActualAmount即为退款金额
-                RefundTime = o.OrderType == 2 ? o.PaymentTime : null  // 退款时间
+                RefundTime = o.OrderType == 2 ? o.PaymentTime : null,  // 退款时间
+                RelatedOrderActualAmount = o.OrderType == 2 ? ro.ActualAmount : null, // 退款订单显示原始订单实付金额
+                IsRefundOrder = o.OrderType == 2
             })
             .ToPagedListAsync(input);
 
@@ -250,7 +252,7 @@ public class OrderService : BaseService<YD_Event.Core.Entities.Order>, ITransien
             .LeftJoin<EventRegistration>((o, e, r) => o.RegistrationId == r.Id)
             .LeftJoin<YD_Event.Core.Entities.Order>((o, e, r, ro) => o.RelatedOrderId == ro.Id)
             .Where(o => o.Id == id)
-            .Select((o, e, r, ro) => new { Order = o, EventName = e.EventName, Registration = r, RelatedOrderNo = ro.OrderNo });
+            .Select((o, e, r, ro) => new { Order = o, EventName = e.EventName, Registration = r, RelatedOrderNo = ro.OrderNo, RelatedOrderActualAmount = ro.ActualAmount });
 
         var orderInfo = await query.FirstAsync();
 
@@ -307,7 +309,9 @@ public class OrderService : BaseService<YD_Event.Core.Entities.Order>, ITransien
             CreatedTime = orderInfo.Order.CreatedTime,
             RelatedOrderNo = orderInfo.RelatedOrderNo,
             ContactName = orderInfo.Registration?.ContactName,
-            ContactPhone = orderInfo.Registration?.ContactPhone
+            ContactPhone = orderInfo.Registration?.ContactPhone,
+            RelatedOrderActualAmount = orderInfo.Order.OrderType == 2 ? orderInfo.RelatedOrderActualAmount : null,
+            IsRefundOrder = orderInfo.Order.OrderType == 2
         };
     }
 
@@ -528,7 +532,9 @@ public class OrderService : BaseService<YD_Event.Core.Entities.Order>, ITransien
                     o.OrderStatus == OrderStatus.Refunded ? "已退款" :
                     o.OrderStatus == OrderStatus.Shipped ? "已发货" :
                     o.OrderStatus == OrderStatus.Completed ? "已完成" : "",
-                CreatedTime = o.CreatedTime
+                CreatedTime = o.CreatedTime,
+                RelatedOrderActualAmount = o.OrderType == 2 ? ro.ActualAmount : null,
+                IsRefundOrder = o.OrderType == 2
             })
             .ToListAsync();
 
@@ -559,7 +565,7 @@ public class OrderService : BaseService<YD_Event.Core.Entities.Order>, ITransien
         var totalActual = orders.Where(x => x.OrderType == "收入").Sum(x => x.ActualAmount);
 
         // 汇总信息行
-        var summaryRange = worksheet.Cells[rowIndex, 1, rowIndex, 14];
+        var summaryRange = worksheet.Cells[rowIndex, 1, rowIndex, 15];
         summaryRange.Merge = true;
         summaryRange.Value = $"汇总信息: 原金额:{totalOriginal}, 优惠金额:{totalDiscount}, 退款金额:{totalRefund}, 实付金额:{totalActual}";
         var summaryStyle = summaryRange.Style;
@@ -576,7 +582,7 @@ public class OrderService : BaseService<YD_Event.Core.Entities.Order>, ITransien
         {
             "订单编号", "单位名称", "所属赛事", "订单类型", "关联订单", 
             "支付方式", "报名方式", "报名用户", "报名账号", "原金额（元）", 
-            "优惠金额（元）", "退款金额（元）", "实付金额（元）", "生成时间"
+            "优惠金额（元）", "退款金额（元）", "原始订单实付金额（元）", "实付金额（元）", "生成时间"
         };
 
         for (int i = 0; i < headers.Length; i++)
@@ -600,6 +606,7 @@ public class OrderService : BaseService<YD_Event.Core.Entities.Order>, ITransien
         {
             var refundAmount = item.OrderType == "退款" ? item.ActualAmount : 0;
             var actualPayAmount = item.OrderType == "收入" ? item.ActualAmount : 0;
+            var relatedAmount = item.IsRefundOrder ? item.RelatedOrderActualAmount : null;
 
             worksheet.Cells[rowIndex, 1].Value = item.OrderNo;
             worksheet.Cells[rowIndex, 2].Value = item.UnitName;
@@ -613,21 +620,23 @@ public class OrderService : BaseService<YD_Event.Core.Entities.Order>, ITransien
             worksheet.Cells[rowIndex, 10].Value = item.OriginalAmount;
             worksheet.Cells[rowIndex, 11].Value = item.DiscountAmount;
             worksheet.Cells[rowIndex, 12].Value = refundAmount;
-            worksheet.Cells[rowIndex, 13].Value = actualPayAmount;
-            worksheet.Cells[rowIndex, 14].Value = item.CreatedTime.ToString("yyyy-MM-dd HH:mm:ss");
+            worksheet.Cells[rowIndex, 13].Value = relatedAmount;
+            worksheet.Cells[rowIndex, 14].Value = actualPayAmount;
+            worksheet.Cells[rowIndex, 15].Value = item.CreatedTime.ToString("yyyy-MM-dd HH:mm:ss");
 
             // 设置金额格式
             worksheet.Cells[rowIndex, 10].Style.Numberformat.Format = "0.00";
             worksheet.Cells[rowIndex, 11].Style.Numberformat.Format = "0.00";
             worksheet.Cells[rowIndex, 12].Style.Numberformat.Format = "0.00";
             worksheet.Cells[rowIndex, 13].Style.Numberformat.Format = "0.00";
+            worksheet.Cells[rowIndex, 14].Style.Numberformat.Format = "0.00";
 
-            SetDataRowStyle(worksheet, rowIndex, 14);
+            SetDataRowStyle(worksheet, rowIndex, 15);
             rowIndex++;
         }
 
         // 设置列宽
-        var columnWidths = new double[] { 18, 15, 15, 10, 12, 10, 10, 12, 14, 12, 14, 14, 12, 18 };
+        var columnWidths = new double[] { 18, 15, 15, 10, 12, 10, 10, 12, 14, 12, 14, 14, 18, 12, 18 };
         for (int i = 0; i < columnWidths.Length; i++)
         {
             worksheet.Column(i + 1).Width = columnWidths[i];
diff --git a/YD_Event.Application/YD_Event.Application.xml b/YD_Event.Application/YD_Event.Application.xml
index d21143d..8206cec 100644
--- a/YD_Event.Application/YD_Event.Application.xml
+++ b/YD_Event.Application/YD_Event.Application.xml
@@ -7276,11 +7276,6 @@
             支付时间
             </summary>
         </member>
-        <member name="P:YD_Event.Application.Event.Dtos.UploadVoucherInput.PayChannel">
-            <summary>
-            支付渠道 (微信/支付宝/银行转账)
-            </summary>
-        </member>
         <member name="P:YD_Event.Application.Event.Dtos.UploadVoucherInput.TransactionId">
             <summary>
             交易流水号 (可选)
@@ -7766,6 +7761,11 @@
             赛事编排服务
             </summary>
         </member>
+        <member name="M:YD_Event.Application.Event.EventArrangementService.FormatDurationSymbol(System.Int32)">
+            <summary>
+            格式化时长显示（符号格式：X'X"）
+            </summary>
+        </member>
         <member name="M:YD_Event.Application.Event.EventArrangementService.GetList(System.Int64)">
             <summary>
             获取编排项目列表
@@ -9966,6 +9966,16 @@
             退款时间
             </summary>
         </member>
+        <member name="P:YD_Event.Application.Order.Dtos.OrderListOutput.RelatedOrderActualAmount">
+            <summary>
+            关联原始订单的实付金额（仅退款订单时有效）
+            </summary>
+        </member>
+        <member name="P:YD_Event.Application.Order.Dtos.OrderListOutput.IsRefundOrder">
+            <summary>
+            是否为退款订单
+            </summary>
+        </member>
         <member name="T:YD_Event.Application.Order.Dtos.OrderDetailOutput">
             <summary>
             订单详情输出
@@ -10086,6 +10096,16 @@
             联系人电话
             </summary>
         </member>
+        <member name="P:YD_Event.Application.Order.Dtos.OrderDetailOutput.RelatedOrderActualAmount">
+            <summary>
+            关联原始订单的实付金额（仅退款订单时有效）
+            </summary>
+        </member>
+        <member name="P:YD_Event.Application.Order.Dtos.OrderDetailOutput.IsRefundOrder">
+            <summary>
+            是否为退款订单
+            </summary>
+        </member>
         <member name="T:YD_Event.Application.Order.Dtos.OrderItemDto">
             <summary>
             订单项目DTO
diff --git a/YD_Event.Core/Extensions/ProjectTimeExtensions.cs b/YD_Event.Core/Extensions/ProjectTimeExtensions.cs
new file mode 100644
index 0000000..1c2cb9f
--- /dev/null
+++ b/YD_Event.Core/Extensions/ProjectTimeExtensions.cs
@@ -0,0 +1,144 @@
+using YD_Event.Core.Entities;
+
+namespace YD_Event.Core.Extensions;
+
+/// <summary>
+/// 项目时间处理扩展类
+/// 用于统一处理 Project 实体的时间计算逻辑
+/// </summary>
+public static class ProjectTimeExtensions
+{
+    /// <summary>
+    /// 获取项目的总时长（秒）
+    /// </summary>
+    /// <param name="project">项目实体</param>
+    /// <returns>总时长（秒）</returns>
+    /// <exception cref="ArgumentNullException">当 project 为 null 时抛出</exception>
+    public static int GetTotalDurationInSeconds(this Project project)
+    {
+        if (project == null)
+            throw new ArgumentNullException(nameof(project));
+
+        // 边界情况处理：确保值不小于 0
+        int minutes = Math.Max(0, project.DurationMinutes);
+        int seconds = Math.Max(0, project.DurationSeconds);
+
+        // 确保秒数不超过 59（一分钟内的秒数）
+        seconds = Math.Min(seconds, 59);
+
+        return minutes * 60 + seconds;
+    }
+
+    /// <summary>
+    /// 设置项目的总时长（秒）
+    /// 自动计算并更新 DurationMinutes 和 DurationSeconds
+    /// </summary>
+    /// <param name="project">项目实体</param>
+    /// <param name="totalSeconds">总时长（秒）</param>
+    /// <exception cref="ArgumentNullException">当 project 为 null 时抛出</exception>
+    /// <exception cref="ArgumentOutOfRangeException">当 totalSeconds 小于 0 时抛出</exception>
+    public static void SetTotalDurationInSeconds(this Project project, int totalSeconds)
+    {
+        if (project == null)
+            throw new ArgumentNullException(nameof(project));
+
+        if (totalSeconds < 0)
+            throw new ArgumentOutOfRangeException(nameof(totalSeconds), "总时长不能小于 0");
+
+        // 计算分钟和秒
+        project.DurationMinutes = totalSeconds / 60;
+        project.DurationSeconds = totalSeconds % 60;
+    }
+
+    /// <summary>
+    /// 标准化项目的时间字段
+    /// 确保 DurationSeconds 在 0-59 范围内，并正确处理负值
+    /// </summary>
+    /// <param name="project">项目实体</param>
+    /// <exception cref="ArgumentNullException">当 project 为 null 时抛出</exception>
+    public static void NormalizeDuration(this Project project)
+    {
+        if (project == null)
+            throw new ArgumentNullException(nameof(project));
+
+        // 先获取总秒数
+        int totalSeconds = project.GetTotalDurationInSeconds();
+
+        // 重新设置，确保标准化
+        project.SetTotalDurationInSeconds(totalSeconds);
+    }
+
+    /// <summary>
+    /// 获取格式化的时长显示字符串（例如："2分30秒" 或 "30秒"）
+    /// </summary>
+    /// <param name="project">项目实体</param>
+    /// <returns>格式化的时长字符串</returns>
+    /// <exception cref="ArgumentNullException">当 project 为 null 时抛出</exception>
+    public static string GetFormattedDuration(this Project project)
+    {
+        if (project == null)
+            throw new ArgumentNullException(nameof(project));
+
+        int totalSeconds = project.GetTotalDurationInSeconds();
+        int minutes = totalSeconds / 60;
+        int seconds = totalSeconds % 60;
+
+        if (minutes == 0)
+        {
+            return $"{seconds}秒";
+        }
+        else if (seconds == 0)
+        {
+            return $"{minutes}分";
+        }
+        else
+        {
+            return $"{minutes}分{seconds}秒";
+        }
+    }
+
+    /// <summary>
+    /// 获取符号格式的时长显示（例如："2'30\"" 或 "30\""）
+    /// </summary>
+    /// <param name="project">项目实体</param>
+    /// <returns>符号格式的时长字符串</returns>
+    /// <exception cref="ArgumentNullException">当 project 为 null 时抛出</exception>
+    public static string GetSymbolFormattedDuration(this Project project)
+    {
+        if (project == null)
+            throw new ArgumentNullException(nameof(project));
+
+        int totalSeconds = project.GetTotalDurationInSeconds();
+        int hours = totalSeconds / 3600;
+        int remainingSeconds = totalSeconds % 3600;
+        int minutes = remainingSeconds / 60;
+        int seconds = remainingSeconds % 60;
+
+        if (hours == 0)
+        {
+            if (seconds == 0)
+            {
+                return $"{minutes}'";
+            }
+            else
+            {
+                string paddedSeconds = seconds.ToString().PadLeft(2, '0');
+                return $"{minutes}'{paddedSeconds}\"";
+            }
+        }
+        else
+        {
+            string result = $"{hours}h";
+            if (minutes > 0 || seconds > 0)
+            {
+                result += $"{minutes}'";
+                if (seconds > 0)
+                {
+                    string paddedSeconds = seconds.ToString().PadLeft(2, '0');
+                    result += $"{paddedSeconds}\"";
+                }
+            }
+            return result;
+        }
+    }
+}
diff --git a/YD_Event.Core/YD_Event.Core.xml b/YD_Event.Core/YD_Event.Core.xml
index 15bde8d..06e8120 100644
--- a/YD_Event.Core/YD_Event.Core.xml
+++ b/YD_Event.Core/YD_Event.Core.xml
@@ -4755,6 +4755,54 @@
             赞助单位
             </summary>
         </member>
+        <member name="T:YD_Event.Core.Extensions.ProjectTimeExtensions">
+            <summary>
+            项目时间处理扩展类
+            用于统一处理 Project 实体的时间计算逻辑
+            </summary>
+        </member>
+        <member name="M:YD_Event.Core.Extensions.ProjectTimeExtensions.GetTotalDurationInSeconds(YD_Event.Core.Entities.Project)">
+            <summary>
+            获取项目的总时长（秒）
+            </summary>
+            <param name="project">项目实体</param>
+            <returns>总时长（秒）</returns>
+            <exception cref="T:System.ArgumentNullException">当 project 为 null 时抛出</exception>
+        </member>
+        <member name="M:YD_Event.Core.Extensions.ProjectTimeExtensions.SetTotalDurationInSeconds(YD_Event.Core.Entities.Project,System.Int32)">
+            <summary>
+            设置项目的总时长（秒）
+            自动计算并更新 DurationMinutes 和 DurationSeconds
+            </summary>
+            <param name="project">项目实体</param>
+            <param name="totalSeconds">总时长（秒）</param>
+            <exception cref="T:System.ArgumentNullException">当 project 为 null 时抛出</exception>
+            <exception cref="T:System.ArgumentOutOfRangeException">当 totalSeconds 小于 0 时抛出</exception>
+        </member>
+        <member name="M:YD_Event.Core.Extensions.ProjectTimeExtensions.NormalizeDuration(YD_Event.Core.Entities.Project)">
+            <summary>
+            标准化项目的时间字段
+            确保 DurationSeconds 在 0-59 范围内，并正确处理负值
+            </summary>
+            <param name="project">项目实体</param>
+            <exception cref="T:System.ArgumentNullException">当 project 为 null 时抛出</exception>
+        </member>
+        <member name="M:YD_Event.Core.Extensions.ProjectTimeExtensions.GetFormattedDuration(YD_Event.Core.Entities.Project)">
+            <summary>
+            获取格式化的时长显示字符串（例如："2分30秒" 或 "30秒"）
+            </summary>
+            <param name="project">项目实体</param>
+            <returns>格式化的时长字符串</returns>
+            <exception cref="T:System.ArgumentNullException">当 project 为 null 时抛出</exception>
+        </member>
+        <member name="M:YD_Event.Core.Extensions.ProjectTimeExtensions.GetSymbolFormattedDuration(YD_Event.Core.Entities.Project)">
+            <summary>
+            获取符号格式的时长显示（例如："2'30\"" 或 "30\""）
+            </summary>
+            <param name="project">项目实体</param>
+            <returns>符号格式的时长字符串</returns>
+            <exception cref="T:System.ArgumentNullException">当 project 为 null 时抛出</exception>
+        </member>
         <member name="T:YD_Event.Core.Extensions.ProjectTypeExtensions">
             <summary>
             项目类型判断扩展方法