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Another team member, Zhao Xian, also had a narrow escape. "It was rainy and I just slipped and was actually hanging in the air," he said. "That scared me so much."

Anthony Fauci, the nation's top infectious disease specialist, has urged political leaders to "be as forceful as possible in getting your citizenry to wear masks".

Another fresh food delivery app Missfresh has seen its orders surge by 300 percent year on year during the epidemic outbreak, according to Wang Jun, CFO of the company.

Another travel guideline on the holiday issued by amap.com and local transport authorities said that the most popular scenic spots included West Lake in Hangzhou, the Bund in Shanghai and the Summer Palace and the Great Wall in Beijing. The results are based on users' search data on amap.com.

Apart from building a cloud computing platform and an enterprise-level blockchain platform, it also applied artificial intelligence to over 1,000 scenarios, including robo-advisory and intelligent customer service.