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Evergreen trees with a height of 15-20 meters and a maximum height of 30 meters. The maximum breast diameter is about 1 meter. The crown is ovate to broadly ovate, the old bark is thick and longitudinally split, dark brown, often scaly and cracked: the upper bark of the trunk is very thin, brownish yellow or pale yellow, and the thin skin falls off. The branches are obvious, 5-12 per round, mostly 7-9, 20 years old, the branches are inclined or flat, the annual branches are pale yellow, and after 2 to 3 years, they become taupe, the base of the big branches and the upper part of the trunk. the same. Buds are cylindrical or oblong, ovate, blunt or pointed, yellow-brown or brown-yellow, with resin on the surface. Leaves two needles. Rare three needles, rough and slightly twisted, 5 - 8 cm long, 7 - 11 resin channels, large spacing between the tubes. The winter leaves turn yellow-green, and the flowering period is from mid-May to mid-June. It belongs to the wind-flower flower, the female peanut is at the tip of the new branch, and the male peanut is in the lower part of the new branch. 1 year old cones drooping, green, mature from September to October, cones long ovate, yellow-green or gray-yellow; third year spring cones cracked, scales umbilicus, scorpion-like bulges, short thorns, easy Shedding, two seeds per scale, the wings are 3 - 5 times longer than the seeds, the seed size is not equal, flat oval, dark brown, gray black, black, apex tip. The 1000-grain weight varies greatly with the plant in the place of origin, with 7.9 grams of safflower base, 5.4 grams of Daxing'anling, and 10-12 grams of Zhanggutai area.