> For the complete documentation index, see [llms.txt](https://chinhsach.siliconz.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://chinhsach.siliconz.vn/quyen-loi-khach-hang/khi-tham-gia-pre-order.md).

# I. Khi tham gia Pre-Order