diff --git a/src/Jiaowu.Api/Infrastructure/Exams/ExamArrangementService.cs b/src/Jiaowu.Api/Infrastructure/Exams/ExamArrangementService.cs
index 13d858a..e1a9e17 100644
--- a/src/Jiaowu.Api/Infrastructure/Exams/ExamArrangementService.cs
+++ b/src/Jiaowu.Api/Infrastructure/Exams/ExamArrangementService.cs
@@ -55,6 +55,7 @@ public sealed class ExamArrangementService(AppDbContext db)
                 .ThenInclude(x => x.Seats)
             .Include(x => x.Rooms)
                 .ThenInclude(x => x.Invigilators)
+            .AsSplitQuery()
             .FirstOrDefaultAsync(x => x.Id == planId, cancellationToken);
 
         if (plan is null)
diff --git a/src/Jiaowu.Api/Infrastructure/Exams/ExamSignInExportJobProcessor.cs b/src/Jiaowu.Api/Infrastructure/Exams/ExamSignInExportJobProcessor.cs
index e2e0f8a..1462b0d 100644
--- a/src/Jiaowu.Api/Infrastructure/Exams/ExamSignInExportJobProcessor.cs
+++ b/src/Jiaowu.Api/Infrastructure/Exams/ExamSignInExportJobProcessor.cs
@@ -60,6 +60,7 @@ public sealed class ExamSignInExportJobProcessor(
                 .ThenBy(x => x.StartPeriod)
                 .ThenBy(x => x.Classroom!.Building!.Name)
                 .ThenBy(x => x.Classroom!.Name)
+                .AsSplitQuery()
                 .ToListAsync(stoppingToken);
 
             var legacySessions = await db.ExamSessions.AsNoTracking()
diff --git a/src/Jiaowu.Api/Infrastructure/Exams/MakeupExamArrangementService.cs b/src/Jiaowu.Api/Infrastructure/Exams/MakeupExamArrangementService.cs
index e4931e7..b31fa1e 100644
--- a/src/Jiaowu.Api/Infrastructure/Exams/MakeupExamArrangementService.cs
+++ b/src/Jiaowu.Api/Infrastructure/Exams/MakeupExamArrangementService.cs
@@ -29,6 +29,7 @@ public sealed class MakeupExamArrangementService(AppDbContext db)
             .Include(x => x.Sessions)
                 .ThenInclude(x => x.TeachingTask)
                     .ThenInclude(x => x!.Course)
+            .AsSplitQuery()
             .FirstOrDefaultAsync(x => x.Id == planId, cancellationToken);
 
         if (plan is null)