People's Daily inform 2385-meter main hole of inclined shaft No. 3 to No. 4 of Xiangshan Tunnel finish. 837 Days of work took. Xiangshan Tunnel has 5 inclined shafts, 7 openings, and 10 working surfaces.  

17.763 kilometers Xiangshan Tunnel longest tunnel of  Zhonglan Railway. 16.037 kilometers excavate finish only 1.726 kilometers stay.

"The geological conditions metamorphic sandstone sandwiched slate, phyllite, and limestone, and some sections penetrate underneath. Binggou, the shallowest buried depth of 47 meters, is affected by faults, folds, fissures, surface water, pore water, fissure water and other factors. The maximum water inflow 3400 square meters./Day, 14 times normal water inflow."

Project is part of China's "Eight Vertical and Eight Horizontal" railway network. it bring fast passenger transportation in Northwest China connecting North China and Northeast China. Train from Zhongwei to Lanzhou will shortened from current 5 hours to 1 hour.

http://nx.people.com.cn/BIG5/n2/2021/1102/c192493-34986784.html