Aerial photo taken on July 13, 2017 shows the Dushanzi-Kuqa highway along the Tianshan Mountains in northwest China's Xinjiang Uygur Autonomous Region. As an important link of the Silk Road Economic Belt, Xinjiang is speeding up the development of transportation and logistics to connect east and west. By the end of 2017, the total length of roads in Xinjiang reached 186,000 km, with 4,578 km of expressways. (Xinhua/Jiang Wenyao)