- 弃旧换新 qìjiùhuànxīn to discard the old for the new; to turn over a new leafTo discard old things for new ones, often used metaphorically for a change in dynasties, a major transformation, or personal reform
- 汰旧换新 tàijiùhuànxīn to replace the old with the newTo discard or phase out what is old and replace it with something new.