> For the complete documentation index, see [llms.txt](https://gitbook-88.gitbook.io/ctf-writeup/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-bjdctf-1.md).

# 2020 BJDCTF

- [old-hack](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-bjdctf-1/old-hack.md)