A visitor looks at a robot at the 6th Shanghai International Service Robot Technology and Application Show in Shanghai, east China, Nov. 20, 2017. More than 150 exhibitors from 24 countries and regions displayed robot products and technologies at the show that kicked off here on Monday. (Xinhua/Fang Zhe)

An intelligent security robot is seen at the 6th Shanghai International Service Robot Technology and Application Show in Shanghai, east China, Nov. 20, 2017. More than 150 exhibitors from 24 countries and regions displayed robot products and technologies at the show that kicked off here on Monday. (Xinhua/Fang Zhe)

Visitors look at a bank service robot at the 6th Shanghai International Service Robot Technology and Application Show in Shanghai, east China, Nov. 20, 2017. More than 150 exhibitors from 24 countries and regions displayed robot products and technologies at the show that kicked off here on Monday. (Xinhua/Fang Zhe)