What Edu means is that the nature of the website is the education industry.

Cn indicates that the domain name is in China (domestic top-level domain name).

Domain name classification and related differences Internet top-level domain names are divided into two categories: gtld and cctld.

I. Generic top-level domain name (gTLD)

. com？ Commercial organizations? VeriSign global registration service

. Net? Network organization? VeriSign global registration service

. org？ Nonprofit organization? Public interest registry

. int？ International organizations? IANA。 Int domain registry

. edu？ Educational institutions? Educational reasons

. gov？ American government department? United States General Services Administration

. Mill? Us military department? U.s. Department of Defense Network Information Center?

Second, cctld country and region code top-level domain name.

Cn (Chinese) China 2.us (USA) USA? 3.JP (Japan) Japan 4.uk (Britain) English abbreviations in Britain and so on.

. Tw Taiwan Province province? . Mo Macao. sg Singapore. ca Canada. au Australia. ru Russia? . Se Sweden? . Hk hong kong?

For example, the following (Tsinghua University) website legend: