I'm still pretty new here but please feel free to ask me any questions and I will be happy to help.
https://www.scribd.com/document/586514801/215640The-Ultimate-Guide-to-fb%E7%B2%89%E7%B5%B2%E5%B0%88%E9%A0%81qr-code%E6%89%8B%E6%A9%9F%E7%89%88