bù yòng
不用介绍了，我们认识
Bù yòng jiè shào le, wǒ men rèn shi.
No need for introductions, we know each other.
大家都是自己人，不用客气。参看64页“甭”。
Dà jiā dōu shì zì jǐ rén, bù yòng kè qi. Cān kàn 64 yè 'béng'.
We're all family here, no need to be polite. See page 64 for 'béng'.