A staff member reacts with a robot at the fifth World Intelligence Congress at Tianjin Meijiang Conference and Exhibition Center in north China's Tianjin, May 23, 2021.(Xinhua/Sun Fanyue)

Visitors watch a robot making coffee at the fifth World Intelligence Congress at Tianjin Meijiang Conference and Exhibition Center in north China's Tianjin, May 23, 2021. (Xinhua/Li Ran)

People wait for dessert made by a robot at the fifth World Intelligence Congress at Tianjin Meijiang Conference and Exhibition Center in north China's Tianjin, May 23, 2021. (Xinhua/Li Ran)

Visitors try a service robot at the fifth World Intelligence Congress at Tianjin Meijiang Conference and Exhibition Center in north China's Tianjin, May 23, 2021. (Xinhua/Sun Fanyue)