A visitor operates a robot during the 2018 China International Consumer Electronics Show in Qingdao, East China's Shandong province, July 21, 2018. The four-day electronics show kicked off on Friday. [Photo/Xinhua]

Visitors look at robots during the 2018 China International Consumer Electronics Show in Qingdao, East China's Shandong province, July 21, 2018. The four-day electronics show kicked off on Friday. [Photo/Xinhua]