吐故纳新 tǔ gù nà xīn

DEFINITIONS

  1. lit. to breathe out stale air and breathe in fresh (idiom, from Zhuangzi 庄子); fig. to get rid of the old and bring in the new

CHARACTERS

吐 tǔ vomit, spew out, cough up
故 gù ancient, old; reason, because
纳 nà admit, take, receive, accept
新 xīn new, recent, fresh, modern