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"E-cigarettes should be treated with caution by users, especially those who are non-smokers," the authors wrote.

"Empowering residents from some underprivileged regions in China, Kuaishou has launched a series of rural entrepreneurship incubation programs that educate participants on how to set up and run businesses, as well as help rural residents sell locally made products since 2018," said Song.

"Elderly people have less insulating fat beneath their skin to keep them warm and their body temperature control mechanism may be weaker. Their body may not be able to appropriately respond to the cold weather," a spokesman of the CHP said.

"Digital transformation and industrial digitalization upgrade have accelerated during the novel coronavirus epidemic," said Pan Helin, executive director of the Digital Economy Academy of the Zhongnan University of Economics and Law in Hubei. "New businesses in fields such as online services, artificial intelligence, industrial internet and other smart technologies will create more jobs in the future."

"Design and research of 600 km/h maglev trains is expected to take place at the center," said Ji.