The plum tree sacrifices itself for the peach tree-Sacrifice oneself for another person
　　This idiom comes from a old folk song. the last two stanzas¹ go like this:
　　One family has five brothers, all serving to a minister as attendants. Every five days, they go back home for a reunion, decorating their horses and garments with shining gold. They vie with each other for ostentation² and extravagance, attracting crowds of onlookers³ along the road.
　　Now there is a peach tree by a well, and a plum tree next to it. When worms come to gnaw⁴ at the root of the peach tree, the plum tree invites them to gnaw at its own root. Finally, the plum dies, ossified⁵.
　　Even trees know how to sacrifice for other trees, why can't brothers do the same?

　　李代桃僵
　　这个成语来自于一首古老的民歌。 歌曲的最后两段说的是：
　　一户人家有兄弟五人，都在一个大官的家中做仆人。每隔五天，他们会回家团聚一次。他们用金子装饰马匹和衣服，吸引了许多路人来看。五人互不相让，相互比较谁的排场大。
　　如今一口井边有一棵桃树，桃树旁是一棵李树。有虫子来咬桃树的根，李树便让虫子来咬自己的根。最终，李树变得僵硬，枯死了。
　　连树都知道为了别的树牺牲自己，为什么兄弟之间反而做不到呢？