Why is there always an epidemic in Dongxing, Fangchenggang?

There is a great turnover of people. Fangchenggang Dongxing is a county-level city in Guangxi Province. By September 22nd, 2022, there will be 1 low-risk zones in Dongxing, Fangchenggang. There are six medium-risk areas. According to the local epidemic policy inquiry, due to the intensive flow of people in this area and the difficulty of control, there have been epidemic trips in this area. Therefore, it is necessary to bring the 48-hour nucleic acid test report to this area and report it in advance to prevent the COVID-19 epidemic.