Miyun District is situated in northeast Beijing. It has an area of 2,227 square kilometres (860 sq mi) and a population of 527,683. Miyun District government seat is located in Gulou Subdistrict.

The East Hebei Autonomous Government, also known as the East Ji Autonomous Government and the East Hebei Autonomous Anti-Communist Government, was a short-lived late-1930s state in northern China. It has been described by historians as either a Japanese puppet state or a buffer state.