杀鸡取卵 shājī-qǔluǎn
[kill the hen to get the eggs]为了得到鸡蛋而把母鸡杀了。比喻贪图眼前好处而损害长远利益
请皇上勿再竭泽而渔,杀鸡取卵,为小民留一线生机!