ㄊㄨˇㄍㄨˋㄋㄚˋㄒㄧㄣtǔgù‑nàxīn

吐故纳新
  1. 濁氣比喻揚棄有的吸取事物 企業人事新陳代謝吐故納新提升工作效能實質幫助」。

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