How to realize the function of mass poster redemption by identifying QR code?

Question

Follow the service account to automatically generate a QR code poster. Do you know the fans promoted through the QR code poster?

#WeChat help generate poster QR code (set event triggering, data statistics query)

Answer 1

It's very simple. Go to WeChat to change a QR code with parameters and put the user ID in it. When a new user follows the QR code, they will pass the parameters, which is the ID of the previous home, and then...