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Meanwhile, Xi asked children to be creative, telling them happiness is no windfall, but needs hard work and creation.

Representatives of the summit voiced concern over global challenges, including improving global governance, pushing forward poverty reduction and combating climate change.

Xi said these organizations must always follow the leadership of the CPC so that the people can be united around the CPC in the "widest and closet way."

Also on Friday, the CPC issued a new regulation on the performance of officials, promising that ineptitude could result in demotion or dismissal. It also revised a regulation on discipline inspection, the first change since the rule came into force in 2009.

During his stay in Brazil, Li also announced the establishment of a special fund totaling 30 billion U.S. dollars to back up production capacity cooperation between China and Latin America.