German Chancellor Angela Merkel (front R) shakes hands with Swedish Prime Minister Stefan Loefven (front L) after an opening tour during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing among others. (Xinhua/Shan Yuqi)