diff --git a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingOncologyTaskService.cs b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingOncologyTaskService.cs
index 40e0eecaa..273348f5b 100644
--- a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingOncologyTaskService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingOncologyTaskService.cs
@@ -81,7 +81,7 @@ namespace IRaCIS.Application.Services
               x.IsAnalysisCreate == taskInfo.IsAnalysisCreate &&
               x.IsSelfAnalysis == taskInfo.IsSelfAnalysis &&
               x.VisitTaskNum < taskInfo.VisitTaskNum
-              ).OrderByDescending(x=>x.VisitTaskNum).OrderBy(x => x.ArmEnum)
+              ).OrderByDescending(x=>x.VisitTaskNum).ThenBy(x => x.ArmEnum)
               .FirstNotNullAsync();
             }