革故鼎新

革故鼎新 [gé gù dǐng xīn]

1. ■ （破除旧的， 建立新的） discard the old ways of life in favour of the new; abolish what is old and establish in its place the new order of things; reform the set rules to create sth. new; destroy the old and establish the new; drop old habits and reform; make general reforms