Guangdong has launched new requirements for travelers entering the province from Hong Kong, who from March 1 need to show a nucleic acid test report, according to Shenzhen's office of port of entry and exit.

Under the new rule, a nucleic acid test must be conducted either through nasopharyngeal swab sampling or nasal and throat swab-combined sampling. The sampling method used should be clearly indicated on the test report, otherwise the report will be deemed invalid. Children below the age of 6 should be sampled via a throat swab.

On Feb 23, the office also updated the isolation arrangements for travelers entering the Chinese mainland via Shenzhen Bay checkpoint. Travelers bound for Huizhou and Shanwei cities will be transported to their destination city for a centralized quarantine, while those bound for Shenzhen and 18 other cities within Guangdong will undergo a medical observation in designated hotels in Shenzhen or Dongguan.