為人作嫁（爲人作嫁）　

◎ 為人作嫁 wèirén-zuòjià

[busy oneself with helping other people;fools lade water and wise men catch the fish;slave for others with no benefit to oneself as one who sews sb. else‘s trousseau] 貧窮女子常為富家女出嫁作衣。比喻徒然替他人辛苦出力