To open a health code in Alipay, you need to open data and traffic. If the health code is not displayed, it may be caused by a network problem. When the network is poor, it can't be opened. You can open it by replacing it with a better network.
If you still don't display the health code after opening the traffic, it may be caused by the problem of Alipay software itself. At this time, you need to restart Alipay and then search for the health code.