青黄沟木

Explanation: "Zhuangzi Heaven and Earth": "Rise of the wood, breaking the expense of respect, Qinghuang and the text of its off in the ditch. Xi respect than the break in the ditch, there is evil among U.S. men, and also its loss of a . "Later, because of" Qinghuang groove wood "is the story of unintentional officialdom. 　　Source: "Zhuangzi world" Rise of the wood, breaking the expense of respect, Qinghuang and the text of its off in the ditch. Xi respect than the break in the ditch, there is evil among U.S. men, and its loss of one also. "