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"For example, the amount of monetary tips a minor can give to a livestreaming host in the form of gifts and how much money a child can top up his or her online account should be limited," he said.

"Genki availability within retail channels and its easy-to-carry package have brought it closer to young people," Li added.

"For the children, it was a joy to see people from another country, but for me, it was to see kids who mean the world to me," says Neha Jasmine Rodrigues, one of the volunteer students from the University of Huddersfield who visited the primary school in May.

"Forty years ago, the China-US diplomatic relationship, along with China's reform and opening-up, almost started in the same period," wrote the ambassador.

"For those patients receiving a plasma product for a recognized use, the benefits of treatment …outweigh its risks," the doctors said.