The procedure can also be applied to VVDI MB Tool.
First, use the Xhorse upgrade kit to identify vvdi2 or vvdi prog or vvdi mb, click on the Binding in the upper right corner, and it will come up with a QR code.
Then, find the cartoon character interface on the Xhorse mobile APP, click on Account in the lower right corner, there is a "combind device", click"combind device", and scan the QR code for binding.
You can check how many devices you have combined here.