Zhongguancun National Demonstration Zone, with a planning area of 488 square kilometers, covers 16 sub-parks in 16 districts of Beijing, and the enterprises registered in each sub-park can enjoy the preferential policies of Zhongguancun. The sixteen sub-parks include the Dongcheng Park, Xicheng Park, Chaoyang Park, Haidian Park, Fengtai Park, Shijingshan Park, Mentougou Park, Fangshan Park, Tongzhou Park, Shunyi Park, Daxing - Yizhuang Park, Changping Park, Pinggu Park, Huairou Park, Miyun Park, and Yanqing Park.