diff --git a/Source/Modules/LangModelRelated/SubLMs/lmAssociates.swift b/Source/Modules/LangModelRelated/SubLMs/lmAssociates.swift
index be170656..8dfc1ce6 100644
--- a/Source/Modules/LangModelRelated/SubLMs/lmAssociates.swift
+++ b/Source/Modules/LangModelRelated/SubLMs/lmAssociates.swift
@@ -32,7 +32,7 @@ extension vChewing {
       }
       let arrTarget = target.dropLast().dropFirst().split(separator: ",")
       guard arrTarget.count == 2 else { return target }
-      return "(\(Tekkon.cnvHanyuPinyinToPhona(target: String(arrTarget[0]))),\(arrTarget[1]))"
+      return "(\(Tekkon.cnvHanyuPinyinToPhona(target: String(arrTarget[0]).lowercased())),\(arrTarget[1]))"
     }
 
     @discardableResult public mutating func open(_ path: String) -> Bool {
diff --git a/Source/Modules/LangModelRelated/SubLMs/lmCoreEX.swift b/Source/Modules/LangModelRelated/SubLMs/lmCoreEX.swift
index 5879eb95..12fe3627 100644
--- a/Source/Modules/LangModelRelated/SubLMs/lmCoreEX.swift
+++ b/Source/Modules/LangModelRelated/SubLMs/lmCoreEX.swift
@@ -77,7 +77,7 @@ extension vChewing {
             if !neta[0].isEmpty, !neta[1].isEmpty {
               let theKey = shouldReverse ? String(neta[1]) : String(neta[0])
               let theValue = $0
-              rangeMap[Tekkon.cnvHanyuPinyinToPhona(target: theKey), default: []].append(theValue)
+              rangeMap[Tekkon.cnvHanyuPinyinToPhona(target: theKey.lowercased()), default: []].append(theValue)
             }
           }
         }