is a document markup language and document preparation system for the TeX typesetting program. And it's FREE!!! Fox more information, you can refer to LaTeX in Wikipedia or Chinese TeX, where you can download the package including the latest WinEdit tex editor, MikTeX system and bunch of other useful softwares.
My template, including most common and most used packages, together with the layout setting for A4 paper printing.
I also put several good handbook below for downloading. They are free!!! If you prefer books in Chinese, you can go to CTex Wiki.
The not so short introduction to LaTeX.pdf (Chinese version)
The LaTeX Mathematics Companion.pdf
The Comprehensive LaTeX Symbol List.pdf
The LaTeX Graphics Companion.pdf
Welcome to email me for any LaTeX questions. I am more than happy to communicate and discuss the problems appearing while using it.