African Union Commission Chairperson Moussa Faki Mahamat (L front) shakes hands with High Representative of the European Union for Foreign Affairs and Security Policy Federica Mogherini (R front) after signing a Memorandum of cooperation in the field of peace, security and governance as European Commission President Jean-Claude Juncker (back) witnesses the signature after the 9th meeting of the European Commission and the African Union Commission in Brussels, Belgium, May 23, 2018. (Xinhua/Ye Pingfan)