Crew members of bullet trains which are to operate on the Xi'an-Chengdu High-Speed Railway, pose for pictures in front of the trains in Chengdu, capital of southwest China's Sichuan Province, Dec. 4, 2017. In recent years, a number of China's technological innovations have been making their moves in the world. Among them, Dockless Shared Bicycles, High-speed Rail, Alipay and E-commerce stand out with a reputation of China's "four great new inventions" in modern times, which have made the daily life of the public more and more convenient. (Xinhua/Xue Yubin)
