上台阶

Traditional (Taiwan): 上臺階

shàngtáijiē ㄕㄤˋ ㄊㄞˊ ㄐㄧㄝ

    • to reach a new, higher level
    • to move up a level

Character by character

Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
go up a step
Meaning
To reach a new, higher level, as in results, quality or ability. Approving; like 'move up a level'.

Sources