A visitor experiences drone control via VR technology at the Spectair Group booth during the CeBIT 2017 in Hanover, Germany, on March 20, 2017. The world's leading trade fair showcasing IT and communications products and solutions CeBIT 2017 kicked off on Monday and will last until March 24. The show with the theme "d!conomy - no limits" this year attracted around 3,000 exhibitors from 70 countries and regions and is expected to attract some 200,000 visitors. (Xinhua/Shan Yuqi)