BEIJING/SHANGHAI--China’s health authority called for a stronger and more rigorous testing regime to ensure that the new coronavirus does not escape detection, whether in travelers arriving from abroad or from other parts of the country.

All localities must improve their testing capabilities, including those at border crossings, and report any epidemic information in a timely manner, the National Health Commission cited its director Ma Xiaowei as saying. Ma made the comments on Saturday, but they were released publicly by the ministry on Monday.

China reported 12 new confirmed cases on April 19, the lowest since March 13.

Despite the downtrend, officials remain concerned about the re-emergence of local transmissions in parts of the country, including Beijing, where a central district has been re-classified as high-risk following three recent local infections.

Ma singled out the provinces of Heilongjiang and Guangdong, saying they should identify the “weak links” in their ability to prevent and control the epidemic.

Of the 82 new local infections in China in the past 14 days, northeastern Heilongjiang province accounted for 42 and southern Guangdong province for 30.

The new local cases have been driven by an influx of Chinese nationals coming home from abroad, particularly in Heilongjiang, which has seen a surge in citizens returning from Russia.

International flights to China have been slashed. In particular, flights to the Chinese capital have been diverted to other cities, some hundreds of kilometers away.

Between March 20 and April 19, 135 flights originally bound for Beijing landed in other cities, with 87 percent of the 29,999 passengers quarantined in the cities where they disembarked, Sun Shaohua, an official at the civil aviation regulator, told reporters on Monday.

New local cases have also been due to people arriving from central Hubei province, ground zero of the coronavirus outbreak in China, as well as infected people who until recently had shown no symptoms such as a fever or a cough.

TOUGHER QUARANTINE

The southwestern Guangxi region on Monday further tightened already tough quarantine rules to isolate potential virus carriers.

All people entering Guangxi from overseas will be subject to 14 days of quarantine at a centralized location and 14 days of self-quarantine at home subsequently.

They also need to take two nucleic acid tests and one antibody test, according to a statement posted on the Guangxi health commission’s social media account.

Before entering Guangxi, people who have lived or traveled to areas classified as high-risk or medium-risk in China in the past 14 days must show negative nucleic acid test results, and the tests must have been conducted within the past seven days.

As of Sunday, mainland China had a total of 82,747 confirmed cases and 4,632 deaths.

On Sunday, it reported eight imported cases in people arriving from abroad, down from nine on the previous day.

Four new cases of local infections were reported on Sunday, including three in Heilongjiang and one in Inner Mongolia.

China also reported 49 new asymptomatic cases, up from 44 a day earlier.

China does not include asymptomatic cases, or people who test positive for the virus but do not exhibit clinical symptoms such as a fever, in its official tally of confirmed cases.

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