What does the Longhai Line mean?

Longhai Railway is the east-west traffic artery north of the Yangtze River in China. Starting from Lianyungang, Jiangsu, passing through Xuzhou, Shangqiu, Kaifeng, Zhengzhou, Luoyang and Sanmenxia in Henan, Xi and Baoji in Shaanxi and Lanzhou in Gansu. Total length 1759 km. It spans Jiangsu, Anhui, Henan, Shaanxi and Gansu provinces, and crosses the Huanghuai Plain, the Yellow River Valley in western Henan, the Weihe River Valley and the Yellow River Canyon in Lanzhou on the Longdong Loess Plateau. Longhai Line was built in 1905. 1945 The project quality of Baoji-Tianshui section is poor, and natural disasters such as earthquakes, landslides and landslides often occur, which hinders traffic, so it is called "railway caecum". After 1949, the technical transformation of Baocheng section was carried out, and the railway extended to Lanzhou, and 1952 was opened to traffic. 1977 electrification works will be carried out in Baoji-Lanzhou section 5 1 1 km, and 1984 electrification works will be carried out in Zhengzhou-Baoji section 684 km. Add double track from Baoji to Xuzhou. There are many famous historical and cultural cities and emerging industrial cities along the route. The construction of Longhai Road is of great significance to the east-west traffic in China, the economic, cultural and tourism development in the middle and upper reaches of the Yellow River and the northwest region. With the connection between the western section of Lanzhou-Xinjiang Railway and Kazakhstan-Central Asia Railway, Longhai Railway has become an important part of "Eurasian Continental Bridge".