Network problem: too many people use the health code, resulting in access congestion, and the back end of the health code can not provide information in time, so the crash is not displayed. At this time, you can go to other platforms to check the health code, such as WeChat, Alipay and WeChat official account. In addition, I turned off the network data myself, and my mobile phone was disconnected, so I couldn't generate the health code. In this case, directly open the mobile phone network and click the health code again to see it.
No login and no real-name authentication: to log in to WeChat applet, you need to log in with the mobile phone number bound by WeChat. After logging in successfully, click the Health Code option in the main interface to display the health code.
At the same time, the health code applet can only generate a health code after the user's real name is registered. For example, users need to fill in basic information such as name, certificate type, certificate number and mobile phone number. After filling in, they can only generate epidemic prevention health codes through auditing. The documents registered by general users are all ID cards.
The above contents refer to Baidu Encyclopedia-Health Code.