Taivo A Taiwan Mandarin dictionary

無功而返

wúgōngérfǎn

ㄨˊ ㄍㄨㄥ ㄦˊ ㄈㄢˇ

Simplified 无功而返

  1. 1to return without any achievement (idiom); to go home with one's tail between one's legs

Keep 無功而返 and it comes back until you know it.

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