An antivirus machine is displayed during the 17th China-ASEAN Expo at Nanning International Convention and Exhibition Center in Nanning, South China's Guangxi Zhuang autonomous region, Nov 28, 2020. The expo runs from Nov 27 to 30 in Nanning. [Photo/Xinhua]

A transparent television is displayed during the 17th China-ASEAN Expo at Nanning International Convention and Exhibition Center in Nanning, South China's Guangxi Zhuang autonomous region. The expo runs from Nov 27 to 30 in Nanning. [Photo/Xinhua]

A model of Fuxing bullet train is displayed during the 17th China-ASEAN Expo at Nanning International Convention and Exhibition Center in Nanning, South China's Guangxi Zhuang autonomous region, Nov 28, 2020. The expo runs from Nov 27 to 30 in Nanning. [Photo/Xinhua]

A model of China's Five-hundred-meter Aperture Spherical radio Telescope (FAST) displayed during the 17th China-ASEAN Expo at Nanning International Convention and Exhibition Center in Nanning, south China's Guangxi Zhuang Autonomous Region, Nov 28, 2020. The expo runs from Nov 27 to 30 in Nanning. [Photo/Xinhua]

A model of maglev train displayed during the 17th China-ASEAN Expo at Nanning International Convention and Exhibition Center in Nanning, South China's Guangxi Zhuang autonomous region, Nov 28, 2020. The expo runs from Nov 27 to 30 in Nanning. [Photo/Xinhua]

A visitor tries VR glasses during the 17th China-ASEAN Expo at Nanning International Convention and Exhibition Center in Nanning, South China's Guangxi Zhuang autonomous region, Nov 28, 2020. The expo runs from Nov 27 to 30 in Nanning. [Photo/Xinhua]

Source: Xinhua, China Daily

Editor: Lv Yun