Need. By the end of June, 2022, there were 3 new cases of infection in Xi. According to the relevant regulations on epidemic prevention and control in Wenshui County, it is necessary to carry 48 hours of nucleic acid certificate to and from Wenshui County, and report to the local neighborhood committee or street in advance. It is necessary to carry out home isolation for 7 days, and carry out three nucleic acid tests in medium and high-risk areas (on 1, 4 and 7 days respectively).