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TeX is an electronic typesetting system based on a low-level programming language created by Donald Knuth [1] (TEX is a trademark registered by Honeywell Company in 1980 for its Text Executive text processing system. It is two different things from TeX) . Using TeX, you can perform detailed operations on the layout and generate beautiful documents. TeX provides low-level commands for layout editing, but the operations are complicated and the work efficiency is not high. TeX allows these low-level commands to be used to define extended commands that can perform complex operations.

LaTex is a collection of TeX extension commands developed by Leslie Lamport. LaTexj reduces the workload and difficulty of typesetting by integrating common layout setting operations. LaTex's powerful typesetting functions, especially its support for scientific documents, have made it the de facto standard for writing scientific research papers.

The TeX system generates DVI (Device Independent) files. With the manifold of pdf file format, LaTex can also generate PDF format files while supporting DVI file format. TeX has different implementations on different hardware and operating systems. Currently, the commonly used TeX system on Unix/Linux is teTeX, and there are MiKTeX and fpTeX in Windows. CTeX is a Chinese suite [4]. The following only briefly introduces some common problems in using LaTex.