The Japanese was a serious problem of the Ming Dynasty. Its harassment of the Ming Empire persisted from Hongwu dynasty to Chongzhen, but was generally confined to the southeast coastal area. However, in the Jiajing period, Japanese ravage was especially severe. In Jiajing 34 years（1555）, they almost swept across the South Zhili, and even Anhui's local towns were not spared. The Ming Dynasty Anhui was located in the middle, far from the sea. It had been peaceful for a long time and city defense had long been neglected. It had no ability to resist the Japanese. With the intrusion of the Japanese, it began the defense construction activities, and achieved remarkable results.