清代 

 Political books： 《捕蝗考》 Read works of Chen Fangsheng at 历史大观

　　Jen Zhejiang Qianlong period (now Hangzhou) were written by Chen Fangsheng "catching locusts test," one of China's earliest extant monograph locusts. He argued that killing locust eradication of locusts. In his book, said: "locusts have not been to Mi of virtue and moral integrity, both as to exterminate the will to kill. Although the things different, Road no 2."