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"Chinese companies will follow WTO rules and negotiate import agreements with US companies in accordance with market-based principles to expand imports of goods and services from the US."

"Chinese efforts to help the African continent are very effective and beneficial," he said, adding that he hoped China could share its experience in patient tracking programs and the issuance of electronic health certificates allowing people to go to work, and greater mobility.

"China's online consumption surged significantly despite the coronavirus impact, effectively meeting the daily needs of residents and helping to promote the steady recovery of the economy," Gao added.

"Companies solely trading imported cars that have a small market share will have the impulse to lower the price first, in an aim for a bigger volume," said the expert.

"Congress must find answers to what happened in these two accidents," said Representative Rick Larsen, a Democrat from Washington state and chairman of the Aviation Subcommittee. "The committee will not hesitate to act to assure the safety of the US air system."