Which father is disciple shifu?

It originated from "one day as a teacher, one life as a father". Later, although there was not necessarily such a constraint between master and apprentice. But the word "master" has been used to this day.

Students are often called apprentices or apprentices, which are more common in traditional martial arts and traditional art circles, such as opera (such as Beijing Opera) and Quyi (such as cross talk, storytelling and Allegro). There is a systematic and strict relationship between master and apprentice.