High Quality Content by WIKIPEDIA articles! Ulan Bator Station is located in Ulan Bator, Mongolia. The station is the centre of regional and international traffic in Mongolia. The Trans-Mongolian Railway passes through the station. It is the largest station in Mongolia. The Trans-Mongolian Railway connects Ulan Ude, on the Trans-Siberian Railway in Russia, with the Chinese city of Jining, by way of Ulan Bator in Mongolia. Other important stops in Mongolia are Sükhbaatar, Darkhan, Choir, gauge-changing station). The line was built between 1949 and 1961. In most of Mongolia, it is single track and, in China, double track. The gauge is 1,520 mm (4 ft 11+5 6 in) in Russia and Mongolia and 1,435 mm (4 ft 8+1 2 in) in China. There are important branches leading to Erdenet and Baganuur.