diff --git a/diagramUtils/source/projectModelManager.cpp b/diagramUtils/source/projectModelManager.cpp
index 5c1998e..f675890 100644
--- a/diagramUtils/source/projectModelManager.cpp
+++ b/diagramUtils/source/projectModelManager.cpp
@@ -935,7 +935,7 @@ QList<MeasureAttributeType> ProjectModelManager::processSpecialAttribute(const Q
         }
         else // U
         {
-            underDollarValues = QStringList{"ab", "bc", "ca"}; // ✅ 已修正
+            underDollarValues = QStringList{"a", "b", "c"}; // ✅ 已修正
         }
 
         if (hasSn)
@@ -976,7 +976,7 @@ QList<MeasureAttributeType> ProjectModelManager::processSpecialAttribute(const Q
     {
         QStringList dollarValues =
             (firstChar == 'I') ? QStringList{"A","B","C"}
-                               : QStringList{"AB","BC","CA"};
+                               : QStringList{"A","B","C"};
 
         if (hasSn)
         {