Technicians work on the filling line for liquefied petroleum gas (LPG) rail tanker at the port of Alataw Pass, northwest China's Xinjiang Uygur Autonomous Region, July 29, 2016. The first LPG rail tanker set off from the port of Alataw Pass to Xinjiang's Dushanzi petroleum refining base on Saturday. It carried 240 tons of LPG from Kazakhstan. (Xinhua/Zhu Xiang)