diff --git a/lib/src/chinese/QuestionChi.gf b/lib/src/chinese/QuestionChi.gf
index 3c473fe17..a9d6deb77 100644
--- a/lib/src/chinese/QuestionChi.gf
+++ b/lib/src/chinese/QuestionChi.gf
@@ -14,8 +14,8 @@ concrete QuestionChi of Question = CatChi **
           v = cl.vp.verb ; 
           verb = case a of {
             APlain   => v.s  ++ v.neg ++ v.sn ; 
-            APerf    => v.s  ++ "不"  ++ v.sn ++ v.pp ;
-            ADurStat => v.s  ++ "不"  ++ v.sn ;
+            APerf    => v.s  ++ neg_s ++ v.sn ++ v.pp ;
+            ADurStat => v.s  ++ neg_s ++ v.sn ;
             ADurProg => v.dp ++ v.neg ++ v.dp ++ v.sn ;  -- mei or bu
             AExper   => v.s  ++ v.neg ++ v.sn ++ v.ep
             }
diff --git a/lib/src/chinese/pinyin/ResChi.gf b/lib/src/chinese/pinyin/ResChi.gf
index 56f4c3ee6..0685b4a28 100644
--- a/lib/src/chinese/pinyin/ResChi.gf
+++ b/lib/src/chinese/pinyin/ResChi.gf
@@ -154,8 +154,8 @@ oper
             } ;
           Neg => table {
             APlain   => v.neg ++ v.sn ; --- neg?
-            APerf    => "不" ++ v.sn ++ v.pp ;
-            ADurStat => "不" ++ v.sn ;
+            APerf    => "bù" ++ v.sn ++ v.pp ;
+            ADurStat => "bù" ++ v.sn ;
             ADurProg => v.neg ++ v.dp ++ v.sn ;  -- mei or bu
             AExper   => v.neg ++ v.sn ++ v.ep
             }