According to the current control requirements, people entering (returning to) Beijing must hold the negative certificate of nucleic acid test within 48 hours and the green code of "Beijing Health Treasure", in which the starting time of the negative certificate of nucleic acid test is based on the "report date" in the test report. Old people, children, visually disabled people and hearing disabled people who don't use or operate smart phones can pass by with negative proof of nucleic acid test within 48 hours, and Health Treasure will no longer check; For infants under 3 years old, only check the negative nucleic acid test certificates of peers within 48 hours.