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"Competition brings out the best in us. Square dancing gives us seniors an incentive to get up every morning, and the competitions provide us with a reason to keep dancing," said Yang, who no longer dances as a result of a back injury. She founded the troupe in 2001 with seven neighbors and colleagues.

"China will work with other countries to enhance macro policy coordination, accelerate international cooperation in the digital sector, step up intellectual property protection and facilitate the vibrant growth of the digital economy and sharing economy," he said, noting that such efforts will generate renewed dynamism for the world economy.

"China should drive the need rather than being a follower," he said.

"Countries are understandably eager to open up their societies and their economies. But the virus is still spreading fast. It is still deadly and most people are still susceptible," he said.

"China's environmental industry maintained a growth of about 17 percent in 2017, and the growth of the environmental engineering and equipment sector specifically could reach 15 to 30 percent in 2018," said Wu Shunze, director of the environmental and economic policy research center at the Ministry of Ecology and Environment.