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Mongolia attaches great importance to Mongolia-China relations, and since the outbreak of the COVID-19 epidemic, the two countries have supported and helped each other to fight the epidemic together, Battulga said.

In a telephone conversation with Saudi King Salman bin Abdulaziz Al Saud, Xi said that China will continue to work with Saudi Arabia on the research and development of COVID-19 vaccines, and the two sides should intensify communication and coordination to promote cooperation within the G20 and help make COVID-19 vaccines a global public good.

"We would really hope that the United States could open up its research base at Fort Detrick to the media, release more information about its over 200 bio-labs overseas, and invite WHO experts in to conduct origin-tracing so it has a chance to tell the truth and offer an explanation to the American people and the international community," he added.

China has managed to quickly bring COVID-19 under effective control while ensuring people's basic living needs, Li said, stressing that this has not been easy for a developing country with 1.4 billion people.

The meeting reviewed and approved a series of guidelines on innovative development of foreign trade, vitalizing higher education in the country's central and western regions, standardizing private schools for compulsory education, standardizing medical practices and pushing ahead with garbage sorting.