Introduction to Datan Primary and Secondary Forest: The protected area is 60 kilometers away from Yanqing County and covers an area of ​​12,130 hectares. The average altitude in the area is about 1,100 meters, with the highest being 1,476 meters and the lowest being 550 meters. All kinds of trees are luxuriant, flowers and plants are lush, and there are many kinds of wild animals. It is a typical forest ecosystem.