费力不讨好

Traditional (Taiwan): 費力不討好

fèilìbùtǎohǎo ㄈㄟˋ ㄌㄧˋ ㄅㄨˋ ㄊㄠˇ ㄏㄠˇ

    • arduous and thankless task (idiom) strenuous and unrewarding

Character by character

Sources