Up to now, the "health code" service launched by Alipay has covered many urban areas in China. The general public can visit public places by applying for epidemic prevention health code as personal electronic pass. If you make a mistake in filling in your personal data, you must correct it.
You can't change the date after you fill it in, because if the system records it, there will be problems if you change it again. Health codes are based on actual data and can be generated by citizens or people who have returned to work through online declaration and background audit. 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. Travel card code has not been updated after 15 days. It will be updated under normal circumstances. If the page is not updated, there is something wrong with the page or there is a slight delay. This happens occasionally. Wait a minute.