破舊立新
break with the outmoded and establish the new
破舊俗，立新風(fēng)break with outmoded customs and establish(or build up) new ones;create sth new in place of the old
破舊立新pò jiù lì xīn
掃除一切陳舊過時(shí)的東西，把一切符合時(shí)代發(fā)展的東西建立起來。destroy the old and establish the new, eradicate the old and foster the new, abolish the old and build up the new