The academic name "Kim Song", deciduous tree, with amazing height and straight trunk. Mainly distributed in the altitude of 300-1100 meters. The average tree height is 45.5 meters. The 15th Kim Song growing in front of the old hall of Kaishan, measured in 1988, the chest diameter is 106 cm, up to 56 meters, and the height is the crown of the world's similar tree species. Gu ginkgo, willow fir, money pine can be called the "three musts" of the ancient forest of Tianmu Mountain.