> For the complete documentation index, see [llms.txt](https://www.nhasachso.io.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.nhasachso.io.vn/truc-tuyen/interactive-blocks-1/tac-gia/nguyen-hong-phuong/sach-dao-ly/quyen-1-dao-ly-trong-doi-song/phan/copy-of-chuong/copy-of-page-4-1.md).

# Copy of Page 4