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"Guidance needs to change and needs to be clear that these nonmedical, nonsurgical masks are beneficial to the general public and should be worn when outside of the home," Robert Hecht, a professor of epidemiology at the Yale University School of Public Health, said in an article published Monday on politico.com.

"Flight tickets have low marginal costs. By livestreaming communications, it is easy to target the demand of passengers accurately and sell tickets with small profits and large volumes," Lin said.

"Guangzhou has already become an important hub for applied research and it has influenced research in Europe, North America and Asia," said Zhang Yueguo, Party chief of the Guangdong Academy of Social Sciences.

"For short video services, they meet people's growing need for new forms of entertainment and they better transcend cultural barriers," Dai said. "But, they still need to focus on facilitating localization in different markets, as it is really hard to apply their former operations experience to a new market.

"Gurney was not your typical engineer. He was an engineer and poet.