Beijing officials announced at a news conference that starting Tuesday, anyone arriving from outside the city would have to stay at home for three days and test negative for three days in a row before being allowed out, state broadcaster CCTV said in an online report.
While critics have questioned China's COVID-19 numbers, and specifically its death toll, its intensive approach to trying to contain infections has prevented massive outbreaks and kept new daily cases lower than in many other countries.
Earlier this month, China announced that it was relaxing some of its '"zero-COVID" policies, such as suspending flights from airlines that had brought a certain number of passengers who tested positive. It also cut down the time required in centralized quarantine for international arrivals from seven to five days.
The relaxation of some measures was an attempt to make the policies more "scientific and precise," Lei Haichao, the deputy director of the National Health Commission, said.
Larger cities are still holding on to some of the tested measures, though in a more fragmented manner than shutting down an entire city, which they had previously done.
Shijiazhuang, a city in northern Hebei province, is testing all residents in six districts. In Beijing's Haidian district, home to the city's tech hub and top universities, authorities announced Sunday night that in-person classes were being canceled at elementary and secondary schools.
Guangdong province, home to Guangzhou, reported the largest number of new cases Monday with 9,085 out of a total of 27,095 cases nationwide.
Associated Press news assistant Caroline Chen in Guangzhou, China, contributed to this report.
This story corrects that recent deaths are first in China in nearly six months, not the first in Beijing in over six months, and that relaxed measures were announced earlier this month.