掛招牌

Simplified: 挂招牌

guàzhāopai ㄍㄨㄚˋ ㄓㄠ ˙ㄆㄞ

    • to make one's identity openly known
    • to act under a borrowed name

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
hang up a signboard
Meaning
A variant of 挂牌子: to show one's identity openly, or to act under a borrowed name or pretext.

Sources