Generally, you don't need to go through any formalities to go to low-risk areas. If you are in a low-risk area, go to a high-risk area or a high-risk area, and come to a low-risk area, you may have to do some nucleic acid testing, or even isolate those who have returned to Beijing.
According to the requirements, on the basis of holding the negative certificate of nucleic acid test within 48 hours and the Beijing Health Treasure Green Code, the personnel returning to Beijing should carry out nucleic acid test within 72 hours after arriving in Beijing from 0: 00 on October 22, 2022 to the end of March.