How many meters above sea level is Tanggula Pass?

Tanggula Pass is 523 1 m above sea level. Tanggula is the dividing line between Qinghai Province and Xizang Autonomous Region. Monuments and signs are built at the mountain pass. Many tourists from the Qinghai-Tibet line take photos here as a souvenir. It is also the highest point of the Qinghai-Tibet Highway, where permafrost is distributed, with a thickness of 70-88m. Vegetation is mainly alpine grassland. Both sides of the road are full of mani piles and prayer flags, and vicissitudes of Buddhists can often be seen worshipping here. Tanggula Pass has a wide view. This area is frozen soil, and the water in the soil layer is frozen for many years. The weather in Yamaguchi is extremely unstable. Even in summer, roads are often blocked by heavy snow. The oxygen content in the air here is only 60% of that in the plain area, so passengers passing through Tanggula Pass will have certain altitude sickness.