Premier Li Keqiang said cooperation between the investment strategies of the world's two largest economies would be multifaceted and flexible, as he addressed more than 400 businesspeople, diplomats and experts at the China-EU Business Summit in Brussels on Monday.

Li said one of the many possible approaches to cooperation would be a China-Europe investment fund, as he introduced his ambition to pair China's Belt and Road Initiative with Europe's plan to upgrade infrastructure.

European Commission President Jean-Claude Juncker unveiled a 315 billion euro ($350 billion) investment plan in November in a bid to revitalize the European economy.