Luo Zhaobing, a blasting worker of China Railway Tunnel Group, checks sausage-like packaged explosive in Altun Mountains Tunnel in northwest China's Xinjiang Uygur Autonomous Region on May 18, 2019. The 13-km-long tunnel in the Altun Mountains, northwest China's Xinjiang Uygur Autonomous Region, is the longest tunnel in the region's section of the Golmud-Korla railway. Over 3,700 blasts are needed to carve away this much rock. Thanks to the professionalism and caution of experienced blasting workers like Luo, construction of the railway could now march on into China's deep west. (Xinhua/Ding Lei)