If the WeChat QR code printed on your business card is invalid, this QR code can no longer be used. Solving this problem is also very simple. You just need to put the WeChat QR code into a long-term effective QR code. If the WeChat QR code is invalid, the invalid QR code can be replaced by a newly generated valid WeChat QR code to avoid reprinting. First, you need a QR code generation tool. The following are the specific production steps:

Step 1: Log in to the operation background.

Step 2: Click to add QR code content.

Step 3: Upload a picture of your WeChat QR code (click Upload Picture).

You can generate a QR code after saving. You can see your WeChat QR code after scanning the code. If this WeChat QR code is invalid, you can find your own QR code in the QR code content, click Modify to replace the newly generated WeChat QR code, and click Save to update the QR code, and that's it. The original code of the updated QR code remains unchanged, and the content will become the newly updated content. You don't have to worry about the invalidation of printed business cards.

I hope I can help you!