gǎi​tóu​huàn​miàn

superficial makeover

改头换面 (改頭換面) gǎi​tóu​huàn​miàn
superficial makeover idiom
to change the outward appearance of something while its essence remains the same, often used derogatorily to imply deception

This proposal is just a cosmetic change; the core content remains the same.

transformation idiom
to undergo a thorough or significant change for the better, often used in a non-derogatory sense

After being renovated, the old bookstore was transformed into a popular social media destination.

Frequency

Movie subtitles
3.10 per million appears in 1% of films
Written text
1.21 per million

Sources

Definitions
CC-CEDICT