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BEIJING, Sept. 26 (Xinhua) -- The U.S. government on Friday stepped up its smear campaign against China with an alleged "fact sheet" about China's environmental abuses.

But online and offline sales both "have returned to last year's values after the summer, so we are expecting to close this year at the same level as in 2019, overall," he said.

The safety and effectiveness of the COVID-19 vaccines must comply with relative standards, pass the process validation of mass production and set up controllable quality standards, said Yang Sheng, an official with the National Medical Products Administration, at a press conference in Beijing on Friday.

In a global governance system in which some major powers are "increasingly looking inside with strong economic nationalism, and show disregard for the established rules, the Maritime Silk Road is another opportunity by China to galvanize progressive countries and shape a more beneficial, equal and inclusive international system," he said.

The United States, by frantically attacking other countries, will not solve any of its problems, nor will it make itself great. More and more countries are alleging that the United States is the biggest troublemaker in the world. It keeps withdrawing from international treaties and organizations, and makes selective use of international bodies to stage its political show to serve the purpose of its domestic politics, said the spokesperson.