#BirthdayWish for Ahn Sohee 🎉 #NMIXX #JIWOO #KYUJIN

In the Korean comments

One top comment reads, in translation, “Being from JYP isn’t something you can hide even if you try.” Another calls Sohee’s familiar movement style “muscle memory,” while a third describes the collaboration as NMIXX “going all the way back to Wonder Girls”—pointing viewers toward the JYP performance lineage visible in the dance.

What the words mean

춤선 (chumseon, the line and flow of someone’s dance movements) does not mean a literal “dance line.” Here, comments saying Sohee still has the “JYP 춤선” (chumseon, the line and flow of dance movements) mean that the characteristic shapes and quality of her movement remain recognizable; the expression is casual performance vocabulary.