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As the doctor recalls, his experience of spending a few tough years in rural China when he was very young helped his persistence grow. The quality benefitted him in his research years later.

As the number of novel coronavirus cases has hit record highs in 12 US states, the pandemic also has become more politicized, with US President Donald Trump attributing the rise to increased testing, and the governors of two major states feuding.

As the virus spread has eased, many factories and companies have started resuming production. President Xi Jinping said at a meeting on Sunday that unremitting efforts should be made to pursue orderly resumption of work and production while continuing to control the spread of the disease.

As the obsolete machine and facilities need testing and repairing, the trial run is meant to ensure production can meet national quality standards, and the masks produced this week will be sent to the quality inspection authority, said Wang.

As schools in rural areas have less developed facilities for physical and aesthetic education, the guidelines said that more capable rural primary and secondary schools will be encouraged to build their own venues for physical and aesthetic education and share the venues with nearby schools.