Manila, Nov 13: The 31st Summit of the Association of Southeast Asian tions (Asean) and related meetings began here on Monday, with leaders of 10 member-tions and dialogue partners convening to discuss security, cooperation and regiol integration. The Philippines, Asean’s rotating chair for 2017, set the theme of “Partnering for Change, Engaging the World”, putting security and regiol integrity high on the agenda, reports Xinhua news agency.