A film about the events and history of Soviet-Chinese relations. The film uses films and photographic documents from the period of the Civil War in Russia, provocations at the Chinese Eastern Railway, and the cultural revolution in China. State border between the USSR and China. The city of Zabaikalsk. Streets, buildings of the city. City. Moscow. Yaroslavsky railway station. Fast train "Moscow-Beijing". Passengers boarding, train departure. Train movement. Landscape in the direction of travel. China. Beijing. Train Station. The streets of the town. Railway station "Zabaikalsk". Monument to the heroes of the Civil War in the Valley of Death. The head of the Zabaikalsk locomotive depot MN Abrusevich gives interviews (synchronously). The machinist V. T. Ilyinov. Border guards check the composition, passports of passengers. The Chinese team of drivers in the cabin of the locomotive. The composition departs.