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He also reaffirmed China's commitment to striving to peak carbon dioxide emissions by 2030 and achieve carbon neutrality by 2060.

Next, with COVID-19 vaccines officially approved to enter the market or the yield of vaccines improving steadily, China will put more vaccines into use, inoculating the eligible population as widely as possible, Cui said.

"I believe that the RCEP will also provide a solid foundation for an open, inclusive, and rules-based global trade environment," said Myanmar President U Win Myint at the expo's opening ceremony.

Highlighting the capable leadership of Saudi Arabia over the past year, Wang said the G20 responded to the epidemic with unity, and achieved practical results in many fields, from coordinating policies on vaccine and macro-economy, addressing the debts of developing countries, to promoting trade and investment, digital economy and the flow of people.

It demonstrated China's unswerving determination in responding to challenges brought by the pandemic with the world, in jointly promoting poverty alleviation and building a community with a shared future for humanity, he said.