diff --git a/features/ligation.fea b/features/ligation.fea
index 9e2f8ca..76586f1 100644
--- a/features/ligation.fea
+++ b/features/ligation.fea
@@ -70,10 +70,8 @@ feature calt {
 
 
 lookup cjkCompress {
-	pos [@fwtrail @hwtrail @fwopen @hwopen] @fwopen' <-500 0 -500 0>;
-	pos @fwclose' <0 0 -500 0> [@fwtrail @hwtrail @fwclose @hwclose @fwopen @hwopen];
-	pos @fwtrail' <0 0 -500 0> @fwquoteopen;
-	pos @fwmid' <-250 0 -500 0> @fwquoteopen;
+	sub [@fwtrail @hwtrail @fwopen @hwopen @fwmid @hwmid] @fwopen' by @hwopen;
+	sub @fwclose' [@fwtrail @hwtrail @fwclose @hwclose @fwopen @hwopen @fwmid @hwmid] by @hwclose;
 } cjkCompress;
 
 feature opbd {