A visitor tries a 5G-based panorama live broadcast device during the 2019 Smart China Expo in southwest China's Chongqing Municipality, Aug. 26, 2019. (Xinhua/Tang Yi)

A girl (3rd L) experiences a "5G+ remote control" technology on display during the 2019 Smart China Expo in southwest China's Chongqing Municipality, Aug. 26, 2019. (Xinhua/Tang Yi)

Visitors watch a "5G + 8K live broadcast" during the 2019 Smart China Expo in southwest China's Chongqing Municipality, Aug. 26, 2019. (Xinhua/Tang Yi)

A visitor (1st L) learns about a 5G-based AR (augmented reality) check and maintenance technology during the 2019 Smart China Expo in southwest China's Chongqing Municipality, Aug. 26, 2019. (Xinhua/Tang Yi)

A staff member introduces a 5G-based remote emergency medical aid technology during the 2019 Smart China Expo in southwest China's Chongqing Municipality, Aug. 26, 2019. (Xinhua/Tang Yi)

A staff member shows a 5G-based remote driving technology during the 2019 Smart China Expo in southwest China's Chongqing Municipality, Aug. 26, 2019. The 2019 Smart China Expo kicked off Monday at the Chongqing International Expo Center. (Xinhua/Tang Yi)

A staff member shows a 5G-based AR (augmented reality) device during the 2019 Smart China Expo in southwest China's Chongqing Municipality, Aug. 26, 2019. High techs including 5G live broadcast and 5G remote emergency medical aid are among the expo's highlights. (Xinhua/Tang Yi)