Meaning of bài:
bài
呗
Particle
(bound form) to chant (from Sanskrit "pāṭhaka"); modal particle indicating lack of enthusiasm; modal particle indicating that things should only or can only be done a certain way
Zhè shì hěn jiǎndān de shìqing, shìshì jiù xíng le bei.
这是很简单的事情，试试就行了呗。
This is a very simple thing, just try it.
Tā bù xiǎng qù jiù bù qù bei.
她不想去就不去呗。
If she doesn't want to go, then just let it be.
Rúguǒ nǐ xiǎng kàn diànyǐng, jiù zǎodiǎn yùdìng piào bei.
如果你想看电影，就早点预定票呗。
If you want to watch the movie, just book the tickets early.
