Introduction to the birch forest: The birch forest is mostly distributed on shady slopes between 1000-1600 meters above sea level, with a total of 5 square kilometers. Although it cannot catch up with the oak forest and aspen forest in terms of area, this birch forest is , but it is well-deserved to be the first in area in the Beijing area. White birch has a tall and straight trunk, fine branch crown and white bark.