You can open winrar and select the files to be compressed by volume in the main window. Then click "Add" on the toolbar to pop up the "Compressed File Name and Parameters" dialog box. (or right-click to add to compressed file) Enter the name and save path of the compressed file.
It is not safe to send health codes to others. The green code page of the health code has encryption measures, and others have no right to view it. However, in order to prevent the green code date of birth from being tried out, it is not recommended to send it to others.