兔死狗烹tù sǐ gǒu pēng
[cook the hound when the hares have been run down;trusted aides are eliminated when they have outlived their usefulness,as the hounds are killed for food once all the hares are bagged] 把抓住兔子的猎狗烹煮吃掉。比喻成就事业后就把有功之臣杀了,只能共患难,不能共欢乐。多指独裁专权