The move comes as Europe has quickly surpassed mainland China as the new epicentre of the global pandemic, while domestic cases have tapered off for the past week.
But several new problems are now being managed, including measures to prevent a resurgence of infections as lockdowns are lifted, leading to some public confusion.
China's aviation regulator has slashed the number of global flights in and out of the country, in a drastic move to curtail air travel and limit the rising number of imported Covid-19 cases.
In nearby Macau, one new case, a 27-year-old man who returned from NY via Hong Kong the previous day, was reported, taking the total to 31.
In stepping up efforts to curb the number of imported virus cases, the Chinese Foreign Ministry said later in the day that on a temporary basis it will not allow foreign nationals to enter the country.
Hubei province, home to some 60 million people, reported no new cases on Wednesday and opened its borders. "It's safer that way".
The lockdown of Hubei's capital Wuhan, where the virus first appeared late past year, will be lifted on April 8, a milestone in China's war against the epidemic as Beijing shifts its focus towards stemming imported cases and rebooting the economy.
The fatality rate in Wuhan stood at about 5 per cent, said Qiu Haibo, a medical expert on a panel led by the central government, according to the official People's Daily.
Ninety percent of the 541 total imported cases were confirmed in Chinese citizens, with 40 percent of them being students returning from studying overseas, Vice Foreign Minister Luo Zhaohui told a press conference.
All of the new patients were travelers who came to China from overseas, with the mainland reporting no locally transmitted infections on Wednesday.
Elsewhere in the city, life is slowly returning to normal, but many locals are still concerned that the lifting of restrictions will mean the virus could return.
These were the details of the news China's local COVID-19 cases die down for this day.