ㄅㄧㄢˋㄌㄧㄢˇbiànliǎn

变脸
  1. 態度突然 變臉變臉相處」。

  2. 川劇表演特技表演演員快速改變自己臉譜

to turn hostile suddenly, face changing, a device of Sichuan Opera, a dramatic change of attitude expressing fright, anger etc
bian lian