Aerial photo taken on April 30, 2016 shows the Xinjiang-Tibet highway 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)