2021 Apsara Conference held in Hangzhou, E China (4)

People plays table tennis with a serving robot during the 2021 Apsara Conference in Hangzhou, east China's Zhejiang Province, Oct. 19, 2021. The four-day conference kicked off in Hangzhou on Tuesday. The Apsara Conference, formerly known as Ali cloud developers' conference, is the earliest platform showcasing innovations in China. (Xinhua/Huang Zongzhi)