A visitor views a model of Fengyun-4 satellite during the 2019 China International Industry Fair in east China's Shanghai, Sept. 17, 2019. The fair runs from Sept. 17 to 21 with over 2,600 exhibitors from 27 countries and regions. (Photo: Xinhua)

A visitor (C) tries vacuum moving equipment during the 2019 China International Industry Fair in east China's Shanghai, Sept. 17, 2019. The fair runs from Sept. 17 to 21 with over 2,600 exhibitors from 27 countries and regions. (Photo: Xinhua)

A visitor shakes hands with a bionic robot during the 2019 China International Industry Fair in east China's Shanghai, Sept. 17, 2019. The fair runs from Sept. 17 to 21 with over 2,600 exhibitors from 27 countries and regions. (Photo: Xinhua)

A visitor views a model of Fengyun-3 satellite during the 2019 China International Industry Fair in east China's Shanghai, Sept. 17, 2019. The fair runs from Sept. 17 to 21 with over 2,600 exhibitors from 27 countries and regions. (Photo: Xinhua)

Visitors view the chassis of an electric vehicle during the 2019 China International Industry Fair in east China's Shanghai, Sept. 17, 2019. The fair runs from Sept. 17 to 21 with over 2,600 exhibitors from 27 countries and regions. (Photo: Xinhua)

Visitors view welding robots during the 2019 China International Industry Fair in east China's Shanghai, Sept. 17, 2019. The fair runs from Sept. 17 to 21 with over 2,600 exhibitors from 27 countries and regions. (Photo: Xinhua)

A visitor plays Go game, known as Weiqi in Chinese, with a robot during the 2019 China International Industry Fair in east China's Shanghai, Sept. 17, 2019. The fair runs from Sept. 17 to 21 with over 2,600 exhibitors from 27 countries and regions. (Photo: Xinhua)

Visitors view a garbage sorting robot during the 2019 China International Industry Fair in east China's Shanghai, Sept. 17, 2019. The fair runs from Sept. 17 to 21 with over 2,600 exhibitors from 27 countries and regions. (Photo: Xinhua)