If it is a single health code, you can send pictures directly. If there are more than one, you can create a folder, and then click the right mouse button to select compressed and send to QQ.
The health code is based on real data, which is declared by citizens on the Internet. After background review, the personal QR code can be generated. As an individual entering and leaving electronic certificate locally, the QR code can be declared once, which is universal in the whole city.