According to the introduction of personal library network, Laojie is located in the capital of Guogan District in northern Shan State, Myanmar. Laojie is adjacent to Zhenkang County, Longling County and mangshi City, lincang City, China. The old street covers an area of 1.844 square kilometers and a population of1.5000. There are10.5 million residents in Laojie, of which the Kokang ethnic group accounts for 90%, and other ethnic groups are Wa, Bai and Miao. Old Street uses Chinese, the currency is RMB, and China Communication is used.