Snowy Gobi Desert. They come caravans of camels. Mongolian yurt. Construction of the railway, which will connect the Chinese city of Jining in Ulan Bator and the main line that runs in the USSR. On the construction work of Soviet specialists. Geodesist NF Litvinov on shooting the last kilometer of the railway tracks in the territory of the Mongolian People's Republic. Excavators Road railroad. Laying rails. In the finished section of road trains go. Chinese construction workers who came to train with Soviet specialists. Teacher KG Pruzhensky conducts classes.