【为人作嫁】〖wèi rén zuò jià〗[sew sb. else's trousseau; busy oneself with helping other people; doing work for others with no benefit to oneself; play into the hands of sb]

为她走线飞针女，

人要结婚催礼服。

作昼俾夜忙裁剪，

嫁衣赶制缝纫苦。

穷苦人家的女儿没有钱置备嫁衣，却每年辛辛苦苦地用金线刺绣，给别人做嫁衣。比喻空为别人辛苦。Daughter of poor family has no money to purchase marry clothing, but annually hard take a lot of trouble use gold thread embroidery, to others do marry clothes. Metaphor to empty for others hard work.同：徒劳无益、舍己为人。反：损人利己。