Yunnan-Kopei Railway No. 17 to 32
The Kopei Railway was a line in the Yunnan Province in southwestern China that had been built by the Gèbì Railway Company from 1915. The purpose of the line was the transportation of tin ore from the local mine between Ko-Kiou and Pi-Che-Tchai, what led to the name “Kopei”. It had a gauge of 600 mm, curves with radii of 70 metres, seven tunnels and was 72 km long.