Introduction to red spruce forest: Although red spruce is a shallow-rooted tree species, its lateral root system is very developed, and the root length is three times as long as the trunk. Red spruce has a rich root system and is intertwined. It can gather scattered fine sand together and is the first choice tree for windbreak and sand fixation projects. The Bayan Aobao red-bark spruce forest protects 100,000 acres of large sand dunes, which is of great significance in preventing land desertification.