If you find yourself in red or yellow when scanning the code or inquiring about the health code, please contact the community staff in the jurisdiction as soon as possible for filing, and provide negative proof of previous nucleic acid testing according to the requirements of the community staff (including through the national government service platform, personal identity certificate, national travel code, personal commitment letter and other related materials). The community staff will further evaluate and judge according to everyone's situation, keep the real risks unchanged, implement corresponding control measures, and change the codes for those without risks by the community administrator.