Audience watch a robot football game during the seventh World Intelligence Congress (WIC) in north China's Tianjin, May 20, 2023. The WIC, a major artificial intelligence (AI) event in China, kicked off here on Thursday. [Photo/Xinhua] This photo taken on May 20, 2023 shows robots competing in a football game during the seventh World Intelligence Congress (WIC) in north China's Tianjin. [Photo/Xinhua] This photo taken on May 20, 2023 shows robots competing in a football game during the seventh World Intelligence Congress (WIC) in north China's Tianjin. [Photo/Xinhua] Participants watch a robot football game during the seventh World Intelligence Congress (WIC) in north China's Tianjin, May 20, 2023. [Photo/Xinhua] Participants prepare for a competition during the seventh World Intelligence Congress (WIC) in north China's Tianjin, May 20, 2023. [Photo/Xinhua] Participants adjust their device before a competition during the seventh World Intelligence Congress (WIC) in north China's Tianjin, May 20, 2023. [Photo/Xinhua]