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The role of the troika is to ensure continuity in the G20's work and management across host years.

Li said China and Italy, both heirs to great ancient civilizations, should enhance cultural and people-to-people exchanges, in a bid to lay a more solid foundation for the future development of bilateral relations.

Xi and others gathered at a memorial hall in Nanjing, where 77 years ago invading Japanese soldiers slaughtered more than 300,000 people, mostly unresisting civilians, the newspaper said.

Wang called on APEC economies to strengthen regional agricultural exchanges and cooperation, build a stabilized and long-term cooperative mechanism and set up service platforms for agricultural enterprises and scientific research institutions.

Meanwhile, Chinese Premier Li Keqiang also exchanged congratulations with his counterparts of the six countries.