"In order to deal with how Omicron spreads, we need to promote a model of antigen screening and nucleic acid tests, enable the public to purchase tests by themselves, which is conducive to early detection," Chinese Vice Premier Sun Chunlan was quoted by state broadcaster CCTV as telling a government meeting on Saturday.
The capital of Beijing was among cities that took steps to tighten measures. The city government said that people entering the city should take nucleic acid tests and avoid joining in group meals or gatherings in the first seven days.
In the financial hub of Shanghai, the Disneyland resort said it would reduce its guest capacity and from Sunday require visitors to present negative nucleic acid test results taken within 24 hours.