Edu is one of the universal top-level domains of the Internet, which is mainly used by educational institutions, such as various schools and educational institutions.

It was originally used by educational institutions all over the world, but most of the educational institutions actually used are located in the United States. Therefore, institutions outside the United States generally add the local country code at the back. The suffix of the domain name of educational institutions in China is edu.cn.

Therefore, primary, secondary and tertiary schools in China require the registration of suffixes. As the domain name of the website, edu.cn is to represent educational institutions and standardize them, so as to avoid the "diploma workshop" taking advantage of it.

Common domain name suffixes in life are. com，。 cn，。 China. Gov and so on. But in fact, different domain name suffixes represent different meanings, such as. A business organization or company. Gov of government departments. Cn is China's national top-level domain name.