Polish Prime Minister Beata Szydlo speaks during the opening ceremony of the Hanover Messe 2017 in Hanover, Germany, on April 23, 2017. From April 24 to 28, more than 6,500 exhibitors from 70 nations and regions will present technologies for tomorrow's factories and energy systems in an action-packed industrial technology showcase themed "Integrated Industry - Creating Value". (Xinhua/Yan Feng)
