Visitors watch robot dance at the 15th China-ASEAN Expo in Nanning City, south China's Guangxi Zhuang Autonomous Region, Sept. 13, 2018. High-tech exhibits attracted many visitors at the expo. (Photos: Xinhua)

A visitor experiences 5G remote driving at the 15th China-ASEAN Expo in Nanning City, south China's Guangxi Zhuang Autonomous Region, Sept. 13, 2018. High-tech exhibits attracted many visitors at the expo.

A boy interacts with a robot at the 15th China-ASEAN Expo in Nanning City, south China's Guangxi Zhuang Autonomous Region, Sept. 13, 2018. High-tech exhibits attracted many visitors at the expo.

A visitor experiences helicopter simulator at the 15th China-ASEAN Expo in Nanning City, south China's Guangxi Zhuang Autonomous Region, Sept. 12, 2018. High-tech exhibits attracted many visitors at the expo.

Photo taken on Sept. 13, 2018 shows a civilian drone at the 15th China-ASEAN Expo in Nanning City, south China's Guangxi Zhuang Autonomous Region. High-tech exhibits attracted many visitors at the expo.

Visitors interact with a robot at the 15th China-ASEAN Expo in Nanning City, south China's Guangxi Zhuang Autonomous Region, Sept. 13, 2018. High-tech exhibits attracted many visitors at the expo.

A visitor looks at a meteorological radar at the 15th China-ASEAN Expo in Nanning City, south China's Guangxi Zhuang Autonomous Region, Sept. 13, 2018. High-tech exhibits attracted many visitors at the expo.