新瓶旧酒

old wine in a new bottle (idiom)

lit. new wine in old bottles; fig. new concepts in an old framework; (loan idiom from Matthew 9:17, but fig. meaning is opposite)

different broth but the same old medicine (idiom); a change in name only; a change in form but not in substance

to push out the old and bring in the new (idiom); to innovate

to replace the old with new (idiom)

to get rid of the old to bring in the new (idiom); to innovate