Dongcheng District, North Main Street from Huangsi, Anding Road, Gu Road Road to youth groove connected with the Chaoyang District; East since brick turret by Chunxiu Road, Chaoyang Gate South Main Street, Jian Guo Men South Avenue, Chaoyang District, and bounded; South from Chongwenmen East Main Street, Qianmen East Street, Chongwen District connected with; West Road from the west side of Tiananmen Square, Zhongshan Park to the Western Wall, Western Wall, the Palace Museum, Jingshan Street, Dianmen Avenue, the street outside to an old Gulou Street old Gulou Street, Huangsi neighboring West City. Maximum width 5.2 kilometers east-west, north and south up to 8.3 kilometers, the total area of 25.38 square kilometers. 716 existing alley streets, residential areas 24.