Sanyu (divided into Shangyu, Zhongyu and Xiayu) was named in the early Tang Dynasty and was established in the second year of Hongwu in the Ming Dynasty (1369), with a total area of ??more than 400 square kilometers. "Three Corners" includes Hengshitang Town, Yinghong Town, Provincial Tea Research Institute, Provincial Yingde Pyrite Mine, Provincial Yingde Prison in present-day Yingde City, and the two village committees of Lianfeng and Pingfeng in Shakou Town. Will wait somewhere.