Xiaoyi city Gas Supply Company: Health Code to Build a Health Wall for Epidemic Prevention and Control. Citizens need to pass the green code when traveling. Starting from 65438+ in March, 2004, according to the arrangement of higher authorities, the health code access system was implemented in five Baolian communities of our company. Residents in the community need to show their health code when entering or leaving the community, and the prevention and control personnel can only pass after scanning the code and displaying the green code. Residents inside and outside the community consciously and actively cooperated and took the initiative to show their health codes. On the one hand, access control scanning code is to create a safe and healthy living environment for residents, on the other hand, it is convenient to track and understand the whereabouts of residents, which is more conducive to epidemic prevention and control.