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An "angle of attack" sensor built into the planes measures the amount of lift generated by the wings. The device warns pilots when there is too little lift, potentially stalling the plane, then points the nose of the plane down to gain speed.

An investigation covering about 600 privately owned museums nationwide showed that three-quarters of them had not properly registered their collections as corporate properties, according to Guan. He emphasized that artifacts in such museums are not the personal property of the operators, but of the museum. Half of the museums also lacked proper financial management, he said.

An increasing number of people will adopt more-hygienic habits after the outbreak, and as a result, more business opportunities will emerge in the hygiene and healthcare markets.

An investor is seen at a securities brokerage in Hangzhou, East China's Zhejiang province, on Feb 11, 2019. [Photo/VCG]

An increasing number of African students are choosing universities in China to study medicine.