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"China and the WHO have been in close communication and cooperation on source tracing since COVID-19 broke out, and Chinese scientists have also been discussing this with scientists in other countries," he told a news briefing in Beijing.

"Canada, Mexico, the EU and China have already retaliated — or announced plans to retaliate — with billions of dollars in tariffs on US-made products," the US Chamber said, adding that approximately billion worth of US exports will be subject to retaliatory tariffs as of this week.

"China and the US are highly complementary in the agricultural sector, and it is in the common interests of both sides to trade foodstuffs with each other. After the two leaders met in Osaka, China has demonstrated great goodwill and positive efforts in purchasing US crops, and has already made considerable progress," Cong Liang, NDRC secretary-general, said during a recent interview with China Central Television.

"By actively expanding domestic effective demand and ramping up policy measures to counter the impacts, the country is capable of fulfilling all the goals of economic and social development for 2020," Cong said.

"But the final decision will depend on the cause of the MAX aircraft grounding, whether it is a result of a design flaw or an operational problem," said the senior executive.