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-Siberian Railway from one side and then exit China and return to Russia on the other side) on this branch, it is still used by several international passenger services between Russia and China. The third primary route is the Trans-Mongolian Railway, which coincides with the Trans-Siberian as far as Ulan-Ude on Lake Baikal's eastern shore. From Ulan-Ude the Trans-Mongolian heads south to Ulaan-Baatar before making its way southeast to Beijing. In 1991, a fourth route running further to the north was finally completed, after more than five decades of sporadic work. Known as the Baikal Amur Mainline (BAM), this recent extension departs