"The movements must be fast and the postures must be handsome."

1. According to the query of Kugou Music, "This movement should be fast, and this posture should be handsome" comes from "Move quickly, and this posture should be handsome".

2. "Move quickly and have handsome posture" is sung by singer Wang Hao. Wang Hao is a music composer whose representative works include "Don't Change".