Trans-Siberian Railway Chita, and Khabarovsk to Vladivostok via southern Siberia. A second primary route is the Trans-Manchurian, which coincides with the Trans-Siberian east of Chita as far as Tarskaya (a stop east of Karymskoye, in Chita Oblast), about east of Lake Baikal. From Tarskaya the Trans-Manchurian heads southeast, via Harbin and Mudanjiang in China's Northeastern Provinces (from where a connection to Beijing is used by one of the Moscow–Beijing trains), joining with the main route in Ussuriysk just north of Vladivostok. This is the shortest and the oldest railway route to Vladivostok. While there are currently no traverse passenger services (enter China
Trans-Mongolian Railway line began in 1947, reaching Ulan Bator from the north in 1950 and the Chinese border in 1955. Before that the only railways in Mongolia had been a line (opened in 1938) connecting the coal mines at Nalaikh to the capital and a Soviet-built freight-only branch (completed in 1939) from Borzya on the Trans-Siberian Railway to Bayantümen, Dornod near Choibalsan in north-eastern Mongolia. Russian Irkutsk State University of Railway Engineering opened its Ulaanbaatar branch in June 2009. The Mongolian Railway company "Mongolyn Tömör Zam" carries 80% of all freight and 30% of all passenger transport within Mongolia. In the aftermath