Introduction to Zhangsong Ridge: Zhangsong Ridge is located in the northwest of Aershan, in the transition zone where the end of the Greater Khingan Mountains intersects with the Mongolian grasslands. It is the only large-scale natural Pinus sylvestris that has been well preserved in my country. The top of the mountain is round and densely wooded. The climatic conditions here are good and suitable for the growth of Pinus sylvestris. It is the natural Pinus sylvestris nature reserve in Aershan City.