改头换面

to change outwardly while remaining essentially the same (derog.) (idiom) / (Tw) (non-derogatory) to change considerably / to undergo a transformation

head / hair style / the top / end / beginning or end / a stub / remnant / chief / boss / side / aspect / first / leading / classifier for pigs or livestock / CL:個|个[ge4]

suffix for nouns

to exchange / to change (clothes etc) / to substitute / to switch / to convert (currency)

face / side / surface / aspect / top / classifier for objects with flat surfaces such as drums, mirrors, flags etc

variant of 麵|面[mian4]

flour / noodles / (of food) soft (not crunchy) / (slang) (of a person) ineffectual / spineless

to change / to alter / to transform / to correct