Workers clean rust from the rail tracks in the factory in Chengdu, Sichuan province, Feb 17, 2016. [Photo/CFP]

Shibantan factory is China's largest rail track welding factory in Chengdu, the capital city of Sichuan province. The factory can produce the single 500-meter long seamless track used in laying high-speed railways.

Trains running on high-speed railways, which are made of seamless tracks, can improve safety, and won't make as much noise as common railways .

Since the factory was founded in 2008, it has produced 11,908 kilometers of rail tracks which have been laid on the railway network in China's southwestern provinces.