Ren Dakai, who is in charge of Xiongan digital transportation lab, manipulates an unmanned vehicle in the lab in Xiongan New Area, north China's Hebei Province, March 26, 2021. The Xiongan digital transportation lab is committed to digital transportation research to boost smart city development.Photo:Xinhua

A staff member of Xiongan digital transportation lab manipulates an unmanned vehicle in Xiongan New Area, north China's Hebei Province, March 26, 2021. The Xiongan digital transportation lab is committed to digital transportation research to boost smart city development.Photo:Xinhua

An unmanned vehicle of Xiongan digital transportation lab is under running test in Xiongan New Area, north China's Hebei Province, March 26, 2021. The Xiongan digital transportation lab is committed to digital transportation research to boost smart city development.Photo:Xinhua

Ren Dakai, who is in charge of Xiongan digital transportation lab, opens the door of an unmanned vehicle in Xiongan New Area, north China's Hebei Province, March 26, 2021. The Xiongan digital transportation lab is committed to digital transportation research to boost smart city development.Photo:Xinhua