Demonstration equipment: Xiaomi 8, MIUI 12.5.5, Alipay 10.3.2 (or WeChat).
First open the phone, find Alipay, and click Open.
Second, after opening Alipay, find the health code on the home page and click Open.
Third, click the download icon on the right side of "Paper Code".
4. Finally, click Save to Album to download your health code to your mobile phone.