diff --git a/YD_Event.Application/Client/Dtos/EventClientDtos.cs b/YD_Event.Application/Client/Dtos/EventClientDtos.cs
index 0c886f8..c0709fa 100644
--- a/YD_Event.Application/Client/Dtos/EventClientDtos.cs
+++ b/YD_Event.Application/Client/Dtos/EventClientDtos.cs
@@ -392,18 +392,16 @@ public class SubmitRegistrationInput
     public string? TeamName { get; set; }
     
     /// <summary>
-    /// 联系人姓名
+    /// 联系人姓名 (个人报名时可自动从用户信息获取)
     /// </summary>
-    [Required(ErrorMessage = "联系人姓名不能为空")]
     [MaxLength(50, ErrorMessage = "联系人姓名不能超过50个字符")]
-    public string ContactName { get; set; }
+    public string? ContactName { get; set; }
     
     /// <summary>
-    /// 联系人电话
+    /// 联系人电话 (个人报名时可自动从用户信息获取)
     /// </summary>
-    [Required(ErrorMessage = "联系人电话不能为空")]
     [RegularExpression(@"^1[3-9]\d{9}$", ErrorMessage = "请输入正确的手机号格式")]
-    public string ContactPhone { get; set; }
+    public string? ContactPhone { get; set; }
     
     /// <summary>
     /// 报名项目列表
@@ -436,11 +434,9 @@ public class SubmitRegistrationItemInput
     public long? GroupId { get; set; }
     
     /// <summary>
-    /// 参赛人员列表
+    /// 参赛人员列表 (个人报名时可自动从用户信息获取)
     /// </summary>
-    [Required(ErrorMessage = "参赛人员列表不能为空")]
-    [MinLength(1, ErrorMessage = "请至少添加一名参赛人员")]
-    public List<PersonInput> Persons { get; set; }
+    public List<PersonInput>? Persons { get; set; }
 }
 
 /// <summary>
diff --git a/YD_Event.Application/Client/Dtos/WeChatDtos.cs b/YD_Event.Application/Client/Dtos/WeChatDtos.cs
new file mode 100644
index 0000000..f54628e
--- /dev/null
+++ b/YD_Event.Application/Client/Dtos/WeChatDtos.cs
@@ -0,0 +1,37 @@
+using System.ComponentModel.DataAnnotations;
+using YD_Event.Core.Infrastructure.WeChat;
+
+namespace YD_Event.Application.Client.Dtos;
+
+/// <summary>
+/// 微信小程序 code2session 输入参数
+/// </summary>
+public class WeChatCode2SessionInput
+{
+    /// <summary>
+    /// 登录时获取的 code
+    /// </summary>
+    [Required(ErrorMessage = "code 不能为空")]
+    public string Code { get; set; }
+}
+
+/// <summary>
+/// 微信小程序 code2session 输出参数
+/// </summary>
+public class WeChatCode2SessionOutput
+{
+    /// <summary>
+    /// 用户唯一标识
+    /// </summary>
+    public string OpenId { get; set; }
+
+    /// <summary>
+    /// 会话密钥
+    /// </summary>
+    public string SessionKey { get; set; }
+
+    /// <summary>
+    /// 用户在开放平台的唯一标识符（在满足 UnionID 下发条件的情况下会返回）
+    /// </summary>
+    public string? UnionId { get; set; }
+}
\ No newline at end of file
diff --git a/YD_Event.Application/Client/EventClientController.cs b/YD_Event.Application/Client/EventClientController.cs
index db23657..686af44 100644
--- a/YD_Event.Application/Client/EventClientController.cs
+++ b/YD_Event.Application/Client/EventClientController.cs
@@ -13,6 +13,7 @@ using Microsoft.AspNetCore.Authorization;
 using Furion.FriendlyException;
 using System.Security.Claims;
 using System.Text.Json;
+using System.IO;
 
 namespace YD_Event.Application.Client;
 
@@ -27,6 +28,7 @@ public class EventClientController : IDynamicApiController
     private readonly ISqlSugarRepository<YD_Event.Core.Entities.Project> _projectRepository;
     private readonly ISqlSugarRepository<EventProject> _eventProjectRepository;
     private readonly ISqlSugarRepository<ProjectGroup> _groupRepository;
+    private readonly ISqlSugarRepository<EventProjectGroup> _eventProjectGroupRepository;
     private readonly ISqlSugarRepository<EventRegistration> _registrationRepository;
     private readonly ISqlSugarRepository<EventRegistrationItem> _registrationItemRepository;
     private readonly ISqlSugarRepository<YD_Event.Core.Entities.Banner> _bannerRepository;
@@ -51,6 +53,7 @@ public class EventClientController : IDynamicApiController
         ISqlSugarRepository<YD_Event.Core.Entities.Project> projectRepository,
         ISqlSugarRepository<EventProject> eventProjectRepository,
         ISqlSugarRepository<ProjectGroup> groupRepository,
+        ISqlSugarRepository<EventProjectGroup> eventProjectGroupRepository,
         ISqlSugarRepository<EventRegistration> registrationRepository,
         ISqlSugarRepository<EventRegistrationItem> registrationItemRepository,
         ISqlSugarRepository<YD_Event.Core.Entities.Banner> bannerRepository,
@@ -74,6 +77,7 @@ public class EventClientController : IDynamicApiController
         _projectRepository = projectRepository;
         _eventProjectRepository = eventProjectRepository;
         _groupRepository = groupRepository;
+        _eventProjectGroupRepository = eventProjectGroupRepository;
         _registrationRepository = registrationRepository;
         _registrationItemRepository = registrationItemRepository;
         _bannerRepository = bannerRepository;
@@ -444,12 +448,39 @@ public class EventClientController : IDynamicApiController
         if (DateTime.Now < evt.RegistrationStartTime || DateTime.Now > evt.RegistrationEndTime)
             throw Oops.Bah("不在报名时间内");
 
-        // 2. 校验重复报名 (同一赛事同一人只能报一次？还是可以多次？通常一次报名包含多个项目)
-        // 假设同一用户对同一赛事只能有一个“未取消”的报名记录
-        var exist = await _registrationRepository.IsAnyAsync(r => r.EventId == input.EventId && r.CreatedUserId == userId && r.RegistrationStatus != 4); // 4=已取消
-        if (exist) throw Oops.Bah("您已报名该赛事，请勿重复提交");
+        // 2. 校验重复报名 - 如果已有未取消的报名记录，直接返回现有记录ID
+        var existingRegistration = await _registrationRepository.GetFirstAsync(
+            r => r.EventId == input.EventId && r.CreatedUserId == userId && r.RegistrationStatus != 4); // 4=已取消
+        
+        if (existingRegistration != null)
+        {
+            // 已有未取消的报名记录，直接返回现有记录ID，让前端跳转到支付页面
+            return existingRegistration.Id;
+        }
 
-        // 3. 校验项目有效性 & 限制
+        // 3. 获取当前用户信息（用于个人报名时自动填充）
+        var appUser = await _appUserRepository.GetFirstAsync(u => u.CreatedUserId == userId && !u.DeleteMark);
+        if (appUser == null && input.RegistrationMode == 1)
+            throw Oops.Bah("请先完成身份认证");
+
+        // 3.5 个人报名模式下自动填充联系人信息
+        if (input.RegistrationMode == 1)
+        {
+            if (string.IsNullOrWhiteSpace(input.ContactName))
+                input.ContactName = appUser?.Name;
+            
+            if (string.IsNullOrWhiteSpace(input.ContactPhone))
+                input.ContactPhone = appUser?.Mobile;
+
+            // 验证必填联系人信息
+            if (string.IsNullOrWhiteSpace(input.ContactName))
+                throw Oops.Bah("联系人姓名不能为空，请先完善身份认证信息");
+            
+            if (string.IsNullOrWhiteSpace(input.ContactPhone))
+                throw Oops.Bah("联系人电话不能为空，请先完善身份认证信息");
+        }
+
+        // 4. 校验项目有效性 & 限制
         if (input.Items == null || !input.Items.Any()) throw Oops.Bah("请至少选择一个项目");
         
         var limit = await _limitRepository.GetFirstAsync(l => l.EventId == input.EventId && !l.DeleteMark);
@@ -480,9 +511,32 @@ public class EventClientController : IDynamicApiController
                     throw Oops.Bah($"项目[{project?.Name}]已达到报名上限，无法继续报名");
                 }
             }
+
+            // 个人报名模式下自动填充参赛人员信息
+            if (input.RegistrationMode == 1 && (item.Persons == null || !item.Persons.Any()))
+            {
+                if (appUser == null)
+                    throw Oops.Bah("请先完成身份认证");
+                
+                item.Persons = new List<PersonInput>
+                {
+                    new PersonInput
+                    {
+                        Name = appUser.Name ?? "",
+                        Gender = appUser.Gender,
+                        IdCardNumber = appUser.IdCardNumber ?? "",
+                        BirthDate = appUser.BirthDate ?? DateTime.Now,
+                        Mobile = appUser.Mobile
+                    }
+                };
+            }
+
+            // 最终验证参赛人员信息
+            if (item.Persons == null || !item.Persons.Any())
+                throw Oops.Bah($"项目未填写参赛人信息");
         }
         
-        // 4. 创建报名主表
+        // 5. 创建报名主表
         var registrationId = _idGenerator.NewLong();
         var registration = new EventRegistration
         {
@@ -507,6 +561,11 @@ public class EventClientController : IDynamicApiController
         var regItems = new List<EventRegistrationItem>();
         var persons = new List<EventRegistrationPerson>();
         
+        // 先获取所有需要的 eventProjectGroup 信息
+        var eventProjectIds = input.Items.Select(i => i.ProjectId).Distinct().ToList();
+        var allEventProjectGroups = await _eventProjectGroupRepository.GetListAsync(
+            eg => eventProjectIds.Contains(eg.EventProjectId) && !eg.DeleteMark);
+        
         foreach (var item in input.Items)
         {
             var eventProject = await _eventProjectRepository.GetFirstAsync(p => p.Id == item.ProjectId);
@@ -515,11 +574,37 @@ public class EventClientController : IDynamicApiController
             var project = await _projectRepository.GetFirstAsync(p => p.Id == eventProject.ProjectId);
             if (project == null) throw Oops.Bah($"关联基础项目不存在: {item.ProjectId}");
 
-            // 校验组别
-            // 略，假设前端传参正确，或需根据 GroupId 查
+            // 获取项目类型名称
+            var projectType = await _projectTypeRepository.GetFirstAsync(t => t.Id == project.ProjectTypeId);
+            var projectTypeName = projectType?.Name ?? "";
 
-            if (item.Persons == null || !item.Persons.Any())
-                throw Oops.Bah($"项目[{project.Name}]未填写参赛人信息");
+            // 获取组别名称 - 优先从前端传的获取，否则从数据库获取默认组别
+            var groupName = item.GroupName;
+            if (string.IsNullOrWhiteSpace(groupName))
+            {
+                var eventProjectGroups = allEventProjectGroups.Where(eg => eg.EventProjectId == item.ProjectId).ToList();
+                if (item.GroupId.HasValue)
+                {
+                    // 如果传了 groupId，优先使用
+                    var selectedGroup = eventProjectGroups.FirstOrDefault(eg => eg.Id == item.GroupId.Value);
+                    groupName = selectedGroup?.GroupName ?? "";
+                }
+                
+                // 如果还是没有，使用第一个组别
+                if (string.IsNullOrWhiteSpace(groupName))
+                {
+                    var firstGroup = eventProjectGroups.FirstOrDefault();
+                    groupName = firstGroup?.GroupName ?? "";
+                }
+                
+                // 如果还是没有，设置默认值
+                if (string.IsNullOrWhiteSpace(groupName))
+                {
+                    groupName = "默认组别";
+                }
+            }
+
+            // 参赛人员已经在前面确保了存在，这里不再重复验证
 
             var regItemId = _idGenerator.NewLong();
             var regItem = new EventRegistrationItem
@@ -528,9 +613,10 @@ public class EventClientController : IDynamicApiController
                 RegistrationId = registrationId,
                 ProjectId = item.ProjectId,
                 ProjectName = project.Name,
-                GroupName = item.GroupName,
+                ProjectTypeName = projectTypeName,
+                GroupName = groupName,
                 UnitPrice = eventProject.Price / 100m,
-                PersonCount = item.Persons.Count,
+                PersonCount = item.Persons!.Count,
                 TotalPrice = (eventProject.Price / 100m) * item.Persons.Count,
                 CreatedUserId = userId,
                 CreatedTime = DateTime.Now
@@ -554,7 +640,7 @@ public class EventClientController : IDynamicApiController
                     IdCard = pInput.IdCardNumber,
                     BirthDate = pInput.BirthDate,
                     Phone = pInput.Mobile,
-                    GroupName = item.GroupName,
+                    GroupName = groupName,
                     ProjectName = project.Name,
                     CreatedUserId = userId,
                     CreatedTime = DateTime.Now
@@ -607,66 +693,86 @@ public class EventClientController : IDynamicApiController
 
         if (reg.PaymentMethod == 2 && reg.TotalAmount > 0)
         {
-            WeChatPayConfig? payConfig = null;
-            if (evt.MerchantId.HasValue)
-            {
-                payConfig = await _weChatPayConfigRepository.GetFirstAsync(x => 
-                    x.MerchantId == evt.MerchantId.Value && 
-                    x.Status == AvailabilityStatus.Enable && 
-                    !x.DeleteMark);
-            }
-
+            // 根据赛事信息获取对应的商户支付配置
+            var payConfig = await GetWeChatPayConfigByEventAsync(evt);
             if (payConfig == null)
             {
-                payConfig = await _weChatPayConfigRepository.GetFirstAsync(x => 
-                    x.Status == AvailabilityStatus.Enable && !x.DeleteMark);
+                _logger.LogError("未找到可用的微信支付配置，赛事ID={EventId}，商户ID={MerchantId}", evt.Id, evt.MerchantId);
+                throw Oops.Bah("未找到可用的微信支付配置，请联系赛事管理员");
             }
 
-            if (payConfig != null)
-            {
-                _logger.LogInformation("开始创建微信 JSAPI 支付订单，订单号={OrderNo}，OpenId={OpenId}", reg.OrderNo, input.OpenId);
+            _logger.LogInformation("开始创建微信 JSAPI 支付订单，订单号={OrderNo}，OpenId={OpenId}，商户ID={MerchantId}", 
+                reg.OrderNo, input.OpenId, payConfig.MerchantId);
                 
-                var jsapiRequest = new CreateJsApiPayRequest
-                {
-                    OutTradeNo = reg.OrderNo,
-                    AppId = configOptions.AppId,
-                    Description = $"{evt.EventName} - 报名费",
-                    NotifyUrl = configOptions.NotifyUrl,
-                    TotalAmount = (int)(reg.TotalAmount * 100),
-                    ExpireTime = DateTimeOffset.Now.AddMinutes(30),
-                    OpenId = input.OpenId
-                };
+            var jsapiRequest = new CreateJsApiPayRequest
+            {
+                OutTradeNo = reg.OrderNo,
+                AppId = configOptions.AppId,
+                Description = $"{evt.EventName} - 报名费",
+                NotifyUrl = configOptions.NotifyUrl,
+                TotalAmount = (int)(reg.TotalAmount * 100),
+                ExpireTime = DateTimeOffset.Now.AddMinutes(30),
+                OpenId = input.OpenId
+            };
 
-                var payResult = await _weChatPayService.CreateJsApiPayAsync(payConfig, jsapiRequest);
-                if (payResult.Success && payResult.JsApiParameters != null)
+            var payResult = await _weChatPayService.CreateJsApiPayAsync(payConfig, jsapiRequest);
+            if (payResult.Success && payResult.JsApiParameters != null)
+            {
+                _logger.LogInformation("微信 JSAPI 支付下单成功，订单号={OrderNo}", reg.OrderNo);
+                paymentInfo.WechatPayParams = new
                 {
-                    _logger.LogInformation("微信 JSAPI 支付下单成功，订单号={OrderNo}", reg.OrderNo);
-                    paymentInfo.WechatPayParams = new
-                    {
-                        appId = payResult.JsApiParameters.AppId,
-                        timeStamp = payResult.JsApiParameters.TimeStamp,
-                        nonceStr = payResult.JsApiParameters.NonceStr,
-                        package = payResult.JsApiParameters.Package,
-                        signType = payResult.JsApiParameters.SignType,
-                        paySign = payResult.JsApiParameters.PaySign
-                    };
-                }
-                else
-                {
-                    _logger.LogError("微信 JSAPI 支付下单失败：订单号={OrderNo}，错误信息={Message}", reg.OrderNo, payResult.Message);
-                    throw Oops.Bah($"微信支付下单失败：{payResult.Message}");
-                }
+                    appId = payResult.JsApiParameters.AppId,
+                    timeStamp = payResult.JsApiParameters.TimeStamp,
+                    nonceStr = payResult.JsApiParameters.NonceStr,
+                    package = payResult.JsApiParameters.Package,
+                    signType = payResult.JsApiParameters.SignType,
+                    paySign = payResult.JsApiParameters.PaySign
+                };
             }
             else
             {
-                _logger.LogError("未找到可用的微信支付配置，赛事ID={EventId}", evt.Id);
-                throw Oops.Bah("未找到可用的微信支付配置");
+                _logger.LogError("微信 JSAPI 支付下单失败：订单号={OrderNo}，错误信息={Message}", reg.OrderNo, payResult.Message);
+                throw Oops.Bah($"微信支付下单失败：{payResult.Message}");
             }
         }
 
         return paymentInfo;
     }
 
+    /// <summary>
+    /// 根据赛事ID精确获取对应的微信支付配置
+    /// </summary>
+    /// <remarks>
+    /// 1. 通过赛事信息中的 MerchantId 查找对应的微信支付配置
+    /// 2. 必须确保赛事已关联商户配置，不使用兜底策略
+    /// 3. 只返回启用状态且未删除的配置
+    /// </remarks>
+    /// <param name="eventInfo">赛事信息，必须包含有效的 MerchantId</param>
+    /// <returns>微信支付配置，如果未找到则返回 null</returns>
+    /// <exception cref="ArgumentException">当赛事没有关联商户配置时抛出</exception>
+    private async Task<WeChatPayConfig?> GetWeChatPayConfigByEventAsync(EventInfo eventInfo)
+    {
+        if (!eventInfo.MerchantId.HasValue)
+        {
+            _logger.LogError("赛事未关联商户配置，赛事ID={EventId}，赛事名称={EventName}", 
+                eventInfo.Id, eventInfo.EventName);
+            throw new ArgumentException($"赛事[{eventInfo.EventName}]未关联商户配置，请联系管理员配置", nameof(eventInfo));
+        }
+
+        var payConfig = await _weChatPayConfigRepository.GetFirstAsync(x => 
+            x.MerchantId == eventInfo.MerchantId.Value && 
+            x.Status == AvailabilityStatus.Enable && 
+            !x.DeleteMark);
+
+        if (payConfig == null)
+        {
+            _logger.LogError("未找到赛事关联的商户支付配置，赛事ID={EventId}，商户ID={MerchantId}", 
+                eventInfo.Id, eventInfo.MerchantId);
+        }
+
+        return payConfig;
+    }
+
     /// <summary>
     /// 上传支付凭证（线下支付）
     /// </summary>
@@ -927,23 +1033,14 @@ public class EventClientController : IDynamicApiController
         var evt = await _eventRepository.GetFirstAsync(e => e.Id == reg.EventId);
         if (evt == null) throw Oops.Bah("赛事不存在");
 
-        WeChatPayConfig? payConfig = null;
-        if (evt.MerchantId.HasValue)
-        {
-            payConfig = await _weChatPayConfigRepository.GetFirstAsync(x => 
-                x.MerchantId == evt.MerchantId.Value && 
-                x.Status == AvailabilityStatus.Enable && 
-                !x.DeleteMark);
-        }
-
+        // 根据赛事信息获取对应的商户支付配置
+        var payConfig = await GetWeChatPayConfigByEventAsync(evt);
         if (payConfig == null)
         {
-            payConfig = await _weChatPayConfigRepository.GetFirstAsync(x => 
-                x.Status == AvailabilityStatus.Enable && !x.DeleteMark);
+            _logger.LogError("未找到可用的微信支付配置，赛事ID={EventId}，商户ID={MerchantId}", evt.Id, evt.MerchantId);
+            throw Oops.Bah("未找到可用的微信支付配置，请联系赛事管理员");
         }
 
-        if (payConfig == null) throw Oops.Bah("微信支付配置未设置");
-
         var queryResult = await _weChatPayService.QueryOrderAsync(payConfig, reg.OrderNo);
         if (queryResult.Success && queryResult.TradeState == "SUCCESS")
         {
@@ -966,11 +1063,21 @@ public class EventClientController : IDynamicApiController
     /// <summary>
     /// 微信支付回调通知处理
     /// </summary>
+    /// <remarks>
+    /// 处理流程：
+    /// 1. 接收微信支付平台回调通知
+    /// 2. 使用平台级别的支付配置验证签名和解密数据（微信平台证书是平台级别）
+    /// 3. 获取订单号后查找报名记录
+    /// 4. 根据报名记录获取赛事信息
+    /// 5. 根据赛事信息获取商户级别的支付配置（用于后续可能的退款等操作）
+    /// 6. 更新订单支付状态
+    /// </remarks>
+    /// <returns>微信支付平台要求的响应格式</returns>
     [HttpPost("wechat-pay-notify")]
     [AllowAnonymous]
     [UnitOfWork]
-    [NonAction]
-    public async Task<object> WeChatPayNotify()
+    [DisplayName("微信支付回调通知")]
+    public async Task<IActionResult> WeChatPayNotify()
     {
         try
         {
@@ -987,16 +1094,17 @@ public class EventClientController : IDynamicApiController
                 string.IsNullOrEmpty(signature) || string.IsNullOrEmpty(serialNumber))
             {
                 _logger.LogWarning("微信支付回调通知参数不完整");
-                return new { code = "FAIL", message = "参数不完整" };
+                return new JsonResult(new { code = "FAIL", message = "参数不完整" });
             }
 
-            // 获取默认支付配置（后续可根据订单号找到对应的商户配置）
-            var payConfig = await _weChatPayConfigRepository.GetFirstAsync(x => 
+            // 第一步：使用平台级别的支付配置验证签名和解密数据
+            // 注意：微信支付签名验证使用的是微信平台证书（平台级别），所有商户共用
+            var platformPayConfig = await _weChatPayConfigRepository.GetFirstAsync(x => 
                 x.Status == AvailabilityStatus.Enable && !x.DeleteMark);
-            if (payConfig == null)
+            if (platformPayConfig == null)
             {
-                _logger.LogError("微信支付配置未找到");
-                return new { code = "FAIL", message = "支付配置未找到" };
+                _logger.LogError("未找到平台级别的微信支付配置");
+                return new JsonResult(new { code = "FAIL", message = "支付配置未找到" });
             }
 
             var notifyRequest = new WeChatPayNotifyRequest
@@ -1009,19 +1117,19 @@ public class EventClientController : IDynamicApiController
             };
 
             // 验证签名
-            var isValid = await _weChatPayService.VerifyPayNotifyAsync(payConfig, notifyRequest);
+            var isValid = await _weChatPayService.VerifyPayNotifyAsync(platformPayConfig, notifyRequest);
             if (!isValid)
             {
                 _logger.LogWarning("微信支付回调签名验证失败");
-                return new { code = "FAIL", message = "签名验证失败" };
+                return new JsonResult(new { code = "FAIL", message = "签名验证失败" });
             }
 
             // 解密通知数据
-            var notifyData = await _weChatPayService.DecryptPayNotifyDataAsync(payConfig, notifyRequest);
+            var notifyData = await _weChatPayService.DecryptPayNotifyDataAsync(platformPayConfig, notifyRequest);
             if (notifyData == null || notifyData.TradeState != "SUCCESS")
             {
                 _logger.LogWarning("微信支付回调数据无效或交易未成功");
-                return new { code = "SUCCESS", message = "成功" };
+                return new JsonResult(new { code = "SUCCESS", message = "成功" });
             }
 
             // 根据商户订单号查找报名记录
@@ -1029,15 +1137,35 @@ public class EventClientController : IDynamicApiController
             if (reg == null)
             {
                 _logger.LogWarning($"未找到订单：{notifyData.OutTradeNo}");
-                return new { code = "SUCCESS", message = "成功" };
+                return new JsonResult(new { code = "SUCCESS", message = "成功" });
             }
 
             if (reg.PaymentStatus == 1)
             {
                 _logger.LogInformation($"订单 {reg.OrderNo} 已处理过支付回调");
-                return new { code = "SUCCESS", message = "成功" };
+                return new JsonResult(new { code = "SUCCESS", message = "成功" });
             }
 
+            // 第二步：获取赛事信息并验证商户配置
+            var evt = await _eventRepository.GetFirstAsync(e => e.Id == reg.EventId);
+            if (evt == null)
+            {
+                _logger.LogError($"未找到赛事信息，订单号：{reg.OrderNo}，赛事ID：{reg.EventId}");
+                return new JsonResult(new { code = "FAIL", message = "赛事信息不存在" });
+            }
+
+            // 验证赛事是否关联了有效的商户支付配置
+            var merchantPayConfig = await GetWeChatPayConfigByEventAsync(evt);
+            if (merchantPayConfig == null)
+            {
+                _logger.LogError("赛事未配置有效的商户支付配置，订单号={OrderNo}，赛事ID={EventId}", 
+                    reg.OrderNo, evt.Id);
+                return new JsonResult(new { code = "FAIL", message = "商户支付配置异常" });
+            }
+
+            _logger.LogInformation("订单支付成功，订单号={OrderNo}，赛事ID={EventId}，商户ID={MerchantId}", 
+                reg.OrderNo, evt.Id, evt.MerchantId);
+
             // 更新支付状态
             reg.PaymentStatus = 1;
             reg.PaymentTime = notifyData.SuccessTime?.DateTime;
@@ -1048,12 +1176,17 @@ public class EventClientController : IDynamicApiController
             await _registrationRepository.UpdateAsync(reg);
             _logger.LogInformation($"订单 {reg.OrderNo} 支付成功，微信交易号：{notifyData.TransactionId}");
 
-            return new { code = "SUCCESS", message = "成功" };
+            return new JsonResult(new { code = "SUCCESS", message = "成功" });
+        }
+        catch (ArgumentException ex)
+        {
+            _logger.LogError(ex, "处理微信支付回调通知时参数验证失败");
+            return new JsonResult(new { code = "FAIL", message = "业务验证失败" });
         }
         catch (Exception ex)
         {
             _logger.LogError(ex, "处理微信支付回调通知异常");
-            return new { code = "FAIL", message = "处理失败" };
+            return new JsonResult(new { code = "FAIL", message = "处理失败" });
         }
     }
 
diff --git a/YD_Event.Application/Client/WeChatController.cs b/YD_Event.Application/Client/WeChatController.cs
new file mode 100644
index 0000000..4ea6144
--- /dev/null
+++ b/YD_Event.Application/Client/WeChatController.cs
@@ -0,0 +1,48 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Logging;
+using YD_Event.Application.Client.Dtos;
+using YD_Event.Core.Infrastructure.WeChat;
+
+namespace YD_Event.Application.Client;
+
+/// <summary>
+/// 微信小程序接口
+/// </summary>
+[ApiDescriptionSettings("微信小程序接口")]
+[AllowAnonymous]
+public class WeChatController : IDynamicApiController
+{
+    private readonly WeChatService _weChatService;
+    private readonly ILogger<WeChatController>_logger;
+
+    public WeChatController(
+        WeChatService weChatService,
+        ILogger<WeChatController>logger)
+    {
+        _weChatService = weChatService;
+        _logger = logger;
+    }
+
+    /// <summary>
+    /// 小程序 code 换取 openid 和 session_key
+    /// </summary>
+    /// <param name="input">包含 code 的输入参数</param>
+    /// <returns>openid、session_key 等信息</returns>
+    [HttpPost("jscode2session")]
+    [DisplayName("小程序 code 换取 openid")]
+    public async Task<WeChatCode2SessionOutput> Code2Session([FromBody] WeChatCode2SessionInput input)
+    {
+        _logger.LogInformation("开始调用微信 code2session 接口");
+
+        var result = await _weChatService.Code2Session(input.Code);
+
+        _logger.LogInformation("微信 code2session 接口调用成功，OpenId={OpenId}", result.OpenId);
+
+        return new WeChatCode2SessionOutput
+        {
+            OpenId = result.OpenId,
+            SessionKey = result.SessionKey,
+            UnionId = result.UnionId
+        };
+    }
+}
\ No newline at end of file
diff --git a/YD_Event.Application/Event/Dtos/EventDtos.cs b/YD_Event.Application/Event/Dtos/EventDtos.cs
index 5fc8c93..8878287 100644
--- a/YD_Event.Application/Event/Dtos/EventDtos.cs
+++ b/YD_Event.Application/Event/Dtos/EventDtos.cs
@@ -473,6 +473,11 @@ public class EventFeeConfigInput
     /// 营业执照图片URL (显示字段)
     /// </summary>
     public string? BusinessLicenseUrl { get; set; }
+    
+    /// <summary>
+    /// 项目价格字典 (key: 项目ID, value: 价格)
+    /// </summary>
+    public Dictionary<long, decimal>? ProjectPrices { get; set; }
 }
 
 /// <summary>
diff --git a/YD_Event.Application/Event/EventService.cs b/YD_Event.Application/Event/EventService.cs
index aba3f6b..97391d9 100644
--- a/YD_Event.Application/Event/EventService.cs
+++ b/YD_Event.Application/Event/EventService.cs
@@ -264,6 +264,16 @@ public class EventService : BaseService<EventInfo>, ITransient
                     output.FeeConfig.BusinessLicenseUrl = merchant.BusinessLicenseUrl;
                 }
             }
+            
+            // 从 EventProject 表中读取项目价格并填充到 ProjectPrices
+            if (eventProjects.Any())
+            {
+                output.FeeConfig.ProjectPrices = new Dictionary<long, decimal>();
+                foreach (var ep in eventProjects)
+                {
+                    output.FeeConfig.ProjectPrices[ep.Id] = ep.Price / 100m;
+                }
+            }
         }
 
         return output;
diff --git a/YD_Event.Application/Event/UserEventRegistrationService.cs b/YD_Event.Application/Event/UserEventRegistrationService.cs
index 4d609d1..0122a47 100644
--- a/YD_Event.Application/Event/UserEventRegistrationService.cs
+++ b/YD_Event.Application/Event/UserEventRegistrationService.cs
@@ -437,12 +437,6 @@ public class UserEventRegistrationService : IDynamicApiController, ITransient
         
         var eventInfo = await _eventRepository.GetByIdAsync(input.EventId);
         if (eventInfo == null) throw Oops.Bah("赛事不存在");
-        
-        // 验证1：一次报名只能选择一个项目
-        if (input.ProjectIds != null && input.ProjectIds.Count > 1)
-        {
-            throw Oops.Bah("一次报名只能选择一个项目");
-        }
 
         // 验证2：一次报名只能选择单个团队内的运动员
         if (input.MemberIds != null && input.MemberIds.Count > 0)
diff --git a/YD_Event.Application/YD_Event.Application.xml b/YD_Event.Application/YD_Event.Application.xml
index bd97233..351ce95 100644
--- a/YD_Event.Application/YD_Event.Application.xml
+++ b/YD_Event.Application/YD_Event.Application.xml
@@ -1958,12 +1958,12 @@
         </member>
         <member name="P:YD_Event.Application.Client.Dtos.SubmitRegistrationInput.ContactName">
             <summary>
-            联系人姓名
+            联系人姓名 (个人报名时可自动从用户信息获取)
             </summary>
         </member>
         <member name="P:YD_Event.Application.Client.Dtos.SubmitRegistrationInput.ContactPhone">
             <summary>
-            联系人电话
+            联系人电话 (个人报名时可自动从用户信息获取)
             </summary>
         </member>
         <member name="P:YD_Event.Application.Client.Dtos.SubmitRegistrationInput.Items">
@@ -1993,7 +1993,7 @@
         </member>
         <member name="P:YD_Event.Application.Client.Dtos.SubmitRegistrationItemInput.Persons">
             <summary>
-            参赛人员列表
+            参赛人员列表 (个人报名时可自动从用户信息获取)
             </summary>
         </member>
         <member name="T:YD_Event.Application.Client.Dtos.PersonInput">
@@ -3029,6 +3029,36 @@
             报名项目集合
             </summary>
         </member>
+        <member name="T:YD_Event.Application.Client.Dtos.WeChatCode2SessionInput">
+            <summary>
+            微信小程序 code2session 输入参数
+            </summary>
+        </member>
+        <member name="P:YD_Event.Application.Client.Dtos.WeChatCode2SessionInput.Code">
+            <summary>
+            登录时获取的 code
+            </summary>
+        </member>
+        <member name="T:YD_Event.Application.Client.Dtos.WeChatCode2SessionOutput">
+            <summary>
+            微信小程序 code2session 输出参数
+            </summary>
+        </member>
+        <member name="P:YD_Event.Application.Client.Dtos.WeChatCode2SessionOutput.OpenId">
+            <summary>
+            用户唯一标识
+            </summary>
+        </member>
+        <member name="P:YD_Event.Application.Client.Dtos.WeChatCode2SessionOutput.SessionKey">
+            <summary>
+            会话密钥
+            </summary>
+        </member>
+        <member name="P:YD_Event.Application.Client.Dtos.WeChatCode2SessionOutput.UnionId">
+            <summary>
+            用户在开放平台的唯一标识符（在满足 UnionID 下发条件的情况下会返回）
+            </summary>
+        </member>
         <member name="T:YD_Event.Application.Client.EventClientController">
             <summary>
             小程序-赛事接口
@@ -3079,6 +3109,19 @@
             <param name="input">支付信息查询输入参数，包含报名记录ID和OpenId</param>
             <returns>支付信息，包括微信支付参数（如果是微信支付）</returns>
         </member>
+        <member name="M:YD_Event.Application.Client.EventClientController.GetWeChatPayConfigByEventAsync(YD_Event.Core.Entities.EventInfo)">
+            <summary>
+            根据赛事ID精确获取对应的微信支付配置
+            </summary>
+            <remarks>
+            1. 通过赛事信息中的 MerchantId 查找对应的微信支付配置
+            2. 必须确保赛事已关联商户配置，不使用兜底策略
+            3. 只返回启用状态且未删除的配置
+            </remarks>
+            <param name="eventInfo">赛事信息，必须包含有效的 MerchantId</param>
+            <returns>微信支付配置，如果未找到则返回 null</returns>
+            <exception cref="T:System.ArgumentException">当赛事没有关联商户配置时抛出</exception>
+        </member>
         <member name="M:YD_Event.Application.Client.EventClientController.UploadPaymentVoucher(System.Int64,YD_Event.Application.Client.Dtos.UploadVoucherInput)">
             <summary>
             上传支付凭证（线下支付）
@@ -3135,6 +3178,16 @@
             <summary>
             微信支付回调通知处理
             </summary>
+            <remarks>
+            处理流程：
+            1. 接收微信支付平台回调通知
+            2. 使用平台级别的支付配置验证签名和解密数据（微信平台证书是平台级别）
+            3. 获取订单号后查找报名记录
+            4. 根据报名记录获取赛事信息
+            5. 根据赛事信息获取商户级别的支付配置（用于后续可能的退款等操作）
+            6. 更新订单支付状态
+            </remarks>
+            <returns>微信支付平台要求的响应格式</returns>
         </member>
         <member name="M:YD_Event.Application.Client.EventClientController.GetOpenIdFromRequest">
             <summary>
@@ -3274,6 +3327,18 @@
             生成自定义 Token
             </summary>
         </member>
+        <member name="T:YD_Event.Application.Client.WeChatController">
+            <summary>
+            微信小程序接口
+            </summary>
+        </member>
+        <member name="M:YD_Event.Application.Client.WeChatController.Code2Session(YD_Event.Application.Client.Dtos.WeChatCode2SessionInput)">
+            <summary>
+            小程序 code 换取 openid 和 session_key
+            </summary>
+            <param name="input">包含 code 的输入参数</param>
+            <returns>openid、session_key 等信息</returns>
+        </member>
         <member name="T:YD_Event.Application.Common.Dtos.AthleteOcrInput">
             <summary>
             OCR识别输入
@@ -4039,6 +4104,11 @@
             营业执照图片URL (显示字段)
             </summary>
         </member>
+        <member name="P:YD_Event.Application.Event.Dtos.EventFeeConfigInput.ProjectPrices">
+            <summary>
+            项目价格字典 (key: 项目ID, value: 价格)
+            </summary>
+        </member>
         <member name="T:YD_Event.Application.Event.Dtos.UpdateEventInput">
             <summary>
             更新赛事输入