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"Case studies and small clinical trials have emerged that appear to be successful in treating COVID-19 using traditional Chinese medicine alone or in combination with Western medical treatment," she said.

"China has always fulfilled its obligations, kept its promises and made significant contributions to the world economy by paying great efforts and costs since it joined the WTO 17 years ago," Foreign Ministry spokesperson Hua Chunying told a routine press briefing.

"China has invested heavily in Africa and therefore it is in its interest to promote peace and security that is key to improve the business environment."

"China does not seek hegemony, nor does it export its development model, but its development, wisdom and plan are very important for the world," he said.

"CSP plants have great environmental benefits as a type of clean energy compared with fossil fuels. CSP plants also generate more stable power than photovoltaic plants," said Han Xiaoping, chief researcher at energy analysis website China5e.