Constructing the tunnel is considered one of most difficult parts of the process of developing the line linking Lanzhou, the capital city of Gansu Province, with Urumqi, the capital of northwest China’s Xinjiang Uygur Autonomous Region, the report said.
The 1,776km Lanxin railway line runs across the Gansu and Qinghai provinces to Xinjiang, traversing the wind-ravaged Gobi Desert.
