Qujing is a prefecture-level city in eastern Yunnan Province of Southwest China. It is an important industrial city, and is Yunnan's second largest city by population, after Kunming. Its population is 5,855,055 according to the 2010 census, of whom 659,925 reside in the built up area. Within a few years, Zhanyi county will be part of this built up area, making an agglomeration of more than 1 million inhabitants. The Five-Chi Road (Wuchidao) in Qujing was the earliest pass opened during the Qin (221BC-206BC) and Han (206BC-220AD) dynasties to linking the transportation in and around Yunnan. By the western Han Dynasty (206BC-24AD), county has been established in this area. In the following five hundred years after the Western Jin Dynasty (265-316)