Beijing–Tongliao railway

The building of the Beijing–Tongliao railway began in October 1972 and was divided into three phases. The construction planning phase took one and a half years. The main construction took four years and was completed on December 12, 1977. The final phase to prepare the line for commercial operation took another two and a half years. The line officially opened on May 1, 1980. At the height of construction, more than 200,000 workers participated in the project. At the time of its construction, the railway was notable for being the second rail line, after the Beijing–Harbin (Jingha) railway, to traverse the Great Wall and connect northern and northeastern China. Whereas the Jingha Line skirts the coast, the Jingtong line runs inland through the rugged Yan Mountains. The Jingtong railway has 116 tunnels that are collectively in length, including the Red Flag Tunnel. The line also has 450 bridges that are in total length, the longest of which, the Laoha River Grand Bridge in Chifeng, at set a record length in China. In all bridges and tunnels account for 15% of the line's total length. ==Route==

, Hebei In Beijing, the Jingtong line begins at Changping North Railway Station, in suburban Changping District north of the city. At Changping North Station, the lines branches off of the Beijing–Baotou railway and then heads northeast through Huairou and Miyun Districts and leaves the city at Gubeikou Pass in the Yan Mountains. The line continues north through Luanping and Longhua counties of Hebei Province before reaching Chifeng in Inner Mongolia. From Chifeng, the line runs northeast following National Highway 111 across the Zhelimu Desert to Tongliao. The main line is long with 86 stations. Including connection lines to the Beijing-Chengde and Shenyang-Chengde railways, the Beijing–Tongliao railway has a total track length of . Rail Junctions • Changping North: Beijing–Baotou railway • Tongliao: Jining–Tongliao railway; Tongliao–Ranghulu railway ==See also==