Miyun

Miyun is a county located in Beijing Municipality, China. It has a total area of approximately 248 square kilometers and a population of around 340,000 people, mostly of Han Chinese ethnicity. Miyun is situated in the northeast of Beijing, bordered by the Beijing-Guangzhou High-Speed Railway to the north, the Changping District to the east, the Huairou District to the south, and the Yanqing County to the west.

The county has a varied terrain, with mountains and hills to the east and north, and vast plains to the west. The Miyun Reservoir, one of the three major water sources for Beijing, is located in the county. The reservoir has a storage capacity of 2.91 billion cubic meters and supplies over 40% of Beijing's water needs. Miyun is also home to the Zhangfang National High-Tech Industrial Development Zone, which is a designated high-tech industrial area in Beijing.

The county has a long history dating back to the Tang Dynasty (618–907 CE), when it was known as the Yanggao Prefecture. During the Ming Dynasty (1368–1644 CE), Miyun became a county under the provincial administration of Beijing. Today, Miyun is a rapidly developing county, with a strong focus on industrialization, urbanization, and environmental protection. The county government has put in place various initiatives to improve its ecological environment and promote sustainable development.