What is the altitude of Dashitou Tunnel?

Dashitou Tunnel is 474 meters above sea level. Dashitou Tunnel is the most beautiful tunnel at high altitude in the world. Dashitou Tunnel is located in Dashitou Township, Mulei Kazak Autonomous County, Changji Hui Autonomous Prefecture. It is the control project of Balikun-Mulei section of G7 line of Beijing-Xinjiang Expressway, with a left tunnel of 69 meters and a right tunnel of 675 meters.