上发条

Traditional (Taiwan): 上發條

shàngfātiáo ㄕㄤˋ ㄈㄚ ㄊㄧㄠˊ

    • to wind up (a watch or other clockwork mechanism)

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
wind the spring
Meaning
To spur someone into more energy and efficiency, as one winds a clock. Informal.

Sources