6-20-20, At the highest altitude, the Lalin Railway Tibetan Yarlung Tsangpo River double-line bridge cast-in-place main girder was successfully completed. The Tibet-Mu-Yarlung Tsangpo River Double-Lane Special Bridge is located in Garcha County, Tibet Autonomous Region, spanning the Yarlung Tsangpo River. Totalling 525.1m, the main arch span of 430m, is the longest span of any concrete-filled steel pipe arch bridges in the world today. At present, the 47 tunnels of Lalin Railway are all connected, and the main structure of 120 bridges have been completed and are expected to be opened to traffic next year.