The process of printing invoices through WeChat payment is as follows:

1. First, we need to find the storage place of electronic invoices in WeChat. Open the WeChat personal page, click "Card Package", find "My Ticket" and click in.

2. Find the invoice we need to print, click it, and we can see the details of the invoice, and click "Forward to Email".

3. The electronic invoice will be sent to your mailbox in PDF format.

4. Open the personal mailbox, download the electronic invoice from the email attachment, and then connect the printer to print it directly.