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"China is now playing an increasingly important role in driving and shaping the rest of the world," Roach said.

"China has been a strong pillar of multilateralism," said UN Secretary-General Antonio Guterres, highlighting that the aim of multilateralism is to build a community with a shared future for mankind.

"China has decided to use carbon pricing as an important means of reducing carbon emissions, and the national trading system will provide enterprises with a clear signal that carbon emissions must be reduced," said Ma Aimin, deputy director-general of the National Center for Climate Change Strategy and International Cooperation.

"By teaming up with Chinese AI company Emotibot, we have come up with a platform where doctors with auto-reply functions can turn spoken language into structured language for AI to understand in real time and give a response, which saves a lot of trouble for physicians," said Jerry Gao, an innovation manager for internet hospitals at Sanofi China.

"China is still 100 percent a developing country," he said. "Regrettably, some countries are taking China's positioning of developing country to make a fuss."