On this day, 41 years ago, on July 30, 1984 (July 3, 1984, the Xining to Golmud section of my country's first plateau railway was delivered for use. On July 30, 1984, my country's first plateau railway from Xining to Golmud was delivered to use Nanshan Station is on the Guanjiaoya side, with an altitude of 3,760 meters. It is currently the highest railway station in China. On July 30, 1984, my country's first plateau railway-the Xining to Golmud section of the first phase of the Qinghai-Tibet Railway was delivered to use. The Xining to Golmud section of the Qinghai-Tibet Railway has a total length of 845 kilometers. Construction started in September 1958, rail laying was carried out to Golmud in September 1979, and later 31 kilometers to Nanshankou Station at the foot of Kunlun Mountain was completed and put into operation in July 1984. Most of the Seger section is located above 3,000 meters above sea level, with an oxygen content of only 70% of sea level. There are special geological areas such as deserts, Gobi, grasslands, swamps, salt lakes, and saline soil along the route, as well as 350 kilometers of waterless areas. A total of 32 kilometers of railways are built on the salt lake. After this railway was opened to traffic, it played a great role in the socialist construction of Qinghai and Xizang. There are now 10 special railway lines connecting the major factories and mines along the line with the railway. The Guanjiaya Tunnel at Golmud Station has a total length of 4,010 meters. The highest point of the line inside the tunnel is 3,700 meters above sea level. It is currently the highest altitude tunnel in China. The Qinghai-Tibet Railway passes through the Chaerhan Salt Lake in the central Qaidam Basin and uses lake salt as embankment filling and building a salt roadbed. It is China's first salt lake railway, 32 kilometers long