Yanshan chestnut, which is produced in the Yanshan Mountains, belongs to the North China variety and has a long history of cultivation. It has the unique flavor of sweet, sweet and fragrant, mainly distributed in the Hebei and Beijing jurisdictions of the Yanshan Mountains. Yanshan chestnut, also known as Jingdong chestnut, has a unique position in the production of chestnut in China. It is a traditional Chinese product, and is well-known at home and abroad.

Changping is located in the suburbs of the capital, 30 kilometers away from the urban area. The Yanshan Mountains traverse the east and west, forming a natural barrier. The north is bounded by the Yanshan and Nanzhao Jingmi diversion canals, and the middle is a narrow hilly hilly landform from east to west. It is the "warm belt in front of the mountain." At the southern end of the warm zone, the Jingmi diversion channel flows slowly from east to west, separating the mountains and plains organically, such as the same natural “air conditioning” to regulate the regional microclimate. The water that Changping apples drink is taken from the deep layer of water filtered by layer below 200M. From the test results of Beijing Municipal Center for Disease Control and Prevention, we can see that the water contains zinc, strontium, selenium, metasilicate and so on. Beneficial minerals, pure water quality, basically reach the standard of silicon-based natural drinking mineral water. The quality of Changping apples grown with mineral water is naturally different.