1 thought on “How to implement the QR code on the self -made mask and use WeChat to scan the code to observe the usage situation?”
Gregory
At present, there is no factory company that has this approach, because the mask is particularly cheap now, and one penny is two cents. There is no need to reuse it at all.
At present, there is no factory company that has this approach, because the mask is particularly cheap now, and one penny is two cents. There is no need to reuse it at all.