From October 26 to 29, 2021, the General Administration of Customs took emergency preventive measures against 8 companies in 5 countries, including Russia, Myanmar, India, Indonesia and Argentina, due to the positive nucleic acid test of SARS-Cov-2 in some frozen seafood samples. The national customs suspended the acceptance of these companies import declaration. Product declaration will resume automatically after expiration. The following are the details.