1. Provincial and municipal health codes can be used in local provinces and cities, and municipal health codes can also be used in local cities.
2. The mutual recognition of health codes among provinces in China has almost been realized. Except for special epidemic areas, health codes of provinces can be used all over the country. You can apply for the national health code and change the area through the country at any time.
As an individual entering and leaving electronic certificate locally, the QR code can be declared once, which is universal in the whole city. The introduction of the health code aims to make the work of returning to work more accurate, scientific and orderly.