> For the complete documentation index, see [llms.txt](https://support.bluedata.vn/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.bluedata.vn/home/phan-mem/he-thong-qr-code-marketing.md).

# Hệ thống QR Code Marketing