A visitor takes photo at the World 5G Convention in Zhengzhou, central China's Henan Province, Dec. 6, 2023. The World 5G Convention kicked off here on Wednesday. (Xinhua/Hao Yuan)

People visit the World 5G Convention in Zhengzhou, central China's Henan Province, Dec. 6, 2023. The World 5G Convention kicked off here on Wednesday. (Xinhua/Hao Yuan)

People visit the World 5G Convention in Zhengzhou, central China's Henan Province, Dec. 6, 2023. The World 5G Convention kicked off here on Wednesday. (Xinhua/Hao Yuan)

People visit the World 5G Convention in Zhengzhou, central China's Henan Province, Dec. 6, 2023. The World 5G Convention kicked off here on Wednesday. (Xinhua/Hao Yuan)

A child interacts with a robot at the World 5G Convention in Zhengzhou, central China's Henan Province, Dec. 6, 2023. The World 5G Convention kicked off here on Wednesday. (Xinhua/Hao Yuan)

A visitor looks at a self-driving bus at the World 5G Convention in Zhengzhou, central China's Henan Province, Dec. 6, 2023. The World 5G Convention kicked off here on Wednesday. (Xinhua/Hao Yuan)

People visit the World 5G Convention in Zhengzhou, central China's Henan Province, Dec. 6, 2023. The World 5G Convention kicked off here on Wednesday. (Xinhua/Hao Yuan)