How to share the health code to the floating window of WeChat?

Open WeChat, enter the payment interface, and click the city service button inside. Then click on the health code in your area and enter it. Since all of them have been applied, we just click on the three buttons in the upper right corner. You can see that one has been added to the desktop. Click Open. You will see a prompt, if you can't add it, it is mainly related to the settings of the mobile phone. After we return, click Add to Desktop again, and you can see the following tips. Let's click Auto Add. When we return to the desktop, we can see the health code of WeChat in our area on the desktop, which is convenient to open. But before adding, you must keep a certain position on the mobile phone desktop, otherwise you can't add it.