People learn to use smart devices during the Tencent Global Digital Ecosystem Summit at Dianchi International Convention and Exhibition Center in Kunming, southwest China's Yunnan Province, on May 21, 2019. (Xinhua/Qin Qing)

People look at an industrial drone during the Tencent Global Digital Ecosystem Summit at Dianchi International Convention and Exhibition Center in Kunming, southwest China's Yunnan Province, on May 21, 2019. (Xinhua/Qin Qing)

Visitors sing at the booth of a singing software during the Tencent Global Digital Ecosystem Summit at Dianchi International Convention and Exhibition Center in Kunming, southwest China's Yunnan Province, on May 21, 2019. (Xinhua/Qin Qing)