Introduction to Nayun Ancient Town: "Nayun" is Dai language, meaning "Inner Capital". According to the old system of the Dai people, Nayun was strictly divided into two villages: upper city, middle city, lower city, and Mangfanggang and Mangfangmao. In the Tusi era, the upper city was where the chieftains and their slaves lived, the middle city was where officials and their families lived, the lower city was where lower-level officials lived, and Mangfanggang and Mangfanggang were the villages where forestry officers and hunters lived. .