Aerial photo taken on Jan. 26, 2018 shows the Lianyungang-Horgos expressway along the Tianshan Mountains, 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/Hu Huhu)