qǐng zì biàn
请 自 便

Meaning：to serve yourself to make your guests feel at home.

For example:

Rúguǒ nǐ xiànzài xiǎng zǒu,qǐngzìbiàn bā .
如果你现在想走，请自便吧.
If you want to go right now,please helf yourself.

Xiǎoyí lái dào jiālǐ,mama jiù duì tā shuō,zìjǐjiā qǐngzìbiàn a.
小姨来到家里，妈妈就对她说，自己家请自便啊.
My aunt came to my home, my mother said to her please made herself at home.

Quick Test

姨妈在招待客人时说“大家（），吃好喝好。”

A.请随便
B.请自便
C.请注意