You can try to unbind and rebind. If you still can't solve the problem, you can contact customer service. When unbinding, it should be noted that the number of health code modifications is limited, and users who exceed the limit cannot modify it again.
Health codes can be handled by family members in Alipay, with a maximum of 4 health codes. The specific ways for Alipay to apply for a healthy green code are as follows:
Open Alipay, search for "health code" in the top search box, and the health codes of all regions will pop up. Select the health code of your own location, and then fill in the information according to the prompts to successfully receive it.