I can't. Because low-temperature construction is a test for construction workers and construction equipment, coupled with strong ultraviolet radiation, it is extremely heavy for the human body. However, although sichuan-tibet railway is located in the plateau region, it is also located in the northern tropical region, with abundant sunshine and great temperature difference. The highest temperature in summer can reach about 40℃, with abundant rainfall, but it can be below zero in winter, and the temperature difference between day and night is generally 35℃. Such an environment can easily lead to mudslides and landslides.