The notice made it clear that health codes should be posted at the entrance of shopping malls and supermarkets, and temperature measuring equipment should be added. All personnel can enter only when the health standard and temperature test are normal and they wear masks. Customers who don't wear masks should be denied access to shopping malls and supermarkets. Wear a mask all the way when taking the elevator. For the elderly who don't use or operate smart phones, their health codes can be registered with valid ID cards, which are handled by relatives and friends, and "travel cards" are given to provide manual service guidance.