Highlights of 2018 China int'l big data industry expo

Visitors look at an unmanned aerial vehicle of JD.com during the 2018 China international big data industry expo in Guiyang, southwest China's Guizhou Province, May 26, 2018. The expo opened in Guiyang Saturday, attracting over 40,000 participants from nearly 30 countries. (Xinhua/Liu Xu)