A driverless delivery car is displayed during the Digital China Exhibition in Fuzhou Strait International Conference and Exhibition Center in Fuzhou, capital of East China’s Fujian province, April 21, 2018. [Photo/Xinhua]

Photo taken on April 18, 2018 shows a driverless street sweeper in Shanghai, East China. Two driverless street sweepers have been employed for trial run in Shanghai Tus-Caohejing Science Park recently. [Photo/Xinhua]

Photo taken on March 23, 2018 shows a subway train running on the first APM line, or the Automated People Mover system, in Shanghai, East China. A new metro line with driverless trains is expected to be tested by the end of March in Shanghai, the Shanghai Shentong Metro Group announced on April 20. [Photo/Xinhua]

A man takes pictures of a ‘Yungui’ train during the launching of the ‘Yungui’ system, a driverless monorail transit system, in Yinchuan, capital of Northwest China’s Ningxia Hui autonomous region, Jan 10, 2018. [Photo/Xinhua]

A train runs on Yanfang subway line in Beijing, capital of China, Dec 30, 2017. Yanfang line started trial operation on April 21. Located in Beijing’s southwest suburbs, the Yanfang Line is China’s first fully domestically developed automated subway. It has nine stations on its 14.4-km main line, linking the areas of Yanshan and Fangshan. The line is expected to carry 70,000 passengers daily. [Photo/Xinhua]

Citizens take a smart bus during the test run in Zhuzhou, Central China’s Hunan province, Oct 23, 2017. The test run of the ART, Autonomous Rail Rapid Transit, started in Zhuzhou on April 23. The ART is developed by the research arm of CRRC Zhuzhou Locomotive Co Ltd, which produces key parts for China’s high-speed railway. The bus is about 30 meters long and equipped with sensors that can read the dimensions of roads and plan its own route. [Photo/Xinhua]