The United Nations Secretary-General Antonio Guterres speaks at the opening ceremony of the 28th African Union (AU) Summit in Addis Ababa, capital of Ethiopia, on Jan. 30, 2017. The 28th AU Summit held under the theme "Harnessing the Demographic Dividend through Investments in Youth" opened on Monday at the AU headquarters in Ethiopia's capital Addis Ababa. (Xinhua/Li Baishun)
