白費蠟

Simplified: 白费蜡

báifèilà ㄅㄞˊ ㄈㄟˋ ㄌㄚˋ

    • to waste effort for no result

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
waste candle wax
Meaning
Efforts are wasted and bring no result. Shortened from the 歇后语 about a blind man lighting a lamp.

Sources