diff --git a/VOL.Ai/Services/AiAppService.cs b/VOL.Ai/Services/AiAppService.cs
index 41715b6..0bf9f0e 100644
--- a/VOL.Ai/Services/AiAppService.cs
+++ b/VOL.Ai/Services/AiAppService.cs
@@ -248,33 +248,41 @@ namespace VOL.Ai.Services
             // =========================
             // 7️⃣ 回查数据库，组装返回 DTO
             // =========================
+            // 1️⃣ 先从数据库拿所有年级和班级
             var dbGrades = await _studentRepository.DbContext.Set<JS_Grade>()
                 .Where(x => x.SchoolCode == schoolCode && allGradeNos.Contains(x.GradeNo))
                 .Include(g => g.Classes)
                 .ToListAsync();
 
-            // 按 GradeNo 分组，只取每组第一个
-            var distinctGrades = dbGrades
-                .GroupBy(g => g.GradeNo)
-                .Select(g => g.First())   
-                .ToList();
+            // 2️⃣ 按 GradeNo 分组
+            var groupedGrades = dbGrades
+                .GroupBy(g => g.GradeNo);
 
-            res.Grade = distinctGrades
-                .Where(g => g.Classes != null && g.Classes.Any())
-                .Select(g => new Grades
+            // 3️⃣ 组装 DTO：每组取第一个年级信息，但班级取全部
+            res.Grade = groupedGrades
+                .Select(g =>
                 {
-                    Id = (int)g.Id,
-                    Name = g.GradeName,
-                    Class = g.Classes.Select(c => new Classes
+                    var firstGrade = g.First(); // 取年级信息
+                                                // 班级合并所有年级的班级
+                    var allClasses = g.SelectMany(x => x.Classes ?? Enumerable.Empty<JS_Class>()).ToList();
+
+                    return new Grades
                     {
-                        Id = (int)c.Id,
-                        Name = c.ClassName
-                    }).ToList()
+                        Id =1,
+                        Name = firstGrade.GradeName,
+                        Class = allClasses
+                            .Select(c => new Classes
+                            {
+                                Id = (int)c.Id,
+                                Name = c.ClassName
+                            })
+                            .ToList()
+                    };
                 })
+                .Where(g => g.Class.Any()) // 过滤掉没有班级的年级
                 .ToList();
 
-
-            return res;
+            //return res;
 
             //if (string.IsNullOrWhiteSpace(paramDto.Code))
             //    throw new ArgumentException("学校编码不能为空", nameof(paramDto.Code));
@@ -313,7 +321,7 @@ namespace VOL.Ai.Services
             //            Class = g.Classes
             //                .Select((c, classIndex) => new Classes
             //                {
-            //                    Id = classIndex + 1,  
+            //                    Id = classIndex + 1,
             //                    Name = c.ClassName
             //                })
             //                .ToList()
@@ -322,7 +330,9 @@ namespace VOL.Ai.Services
             //    .ToList()
             //};
 
-            //return res;
+            var json=  JsonConvert.SerializeObject(res);
+
+            return res;
         }
 
         public Ai_OSSInfoDto OSSInfo(Ai_Request paramDto)