Jack Ma, Co-Chairman of United Nations High-Level Panel on Digital Cooperation, delivers a keynote speech at the Big Data and Smart Technology Summit of the 2019 Smart China Expo in southwest China's Chongqing Municipality, Aug. 26, 2019. (Xinhua/Wang Quanchao)
Smart China Expo kicks off in Chongqing
Source: Xinhua| 2019-08-26 14:44:05|Editor: huaxia
