1, Chinanet: China's public computer internet

2.Cernet: China Education and Scientific Research Computer Network

3.Cstnet: cstnet

4. China Jinqiao Information Network.

Extended data:

At present, there are 10 network operators (that is, the top ten Internet units) and about 200 network service providers (ISPs) with inter-provincial qualifications. The top ten units in the Internet are:

1. China public computer internet (CHINANET)

2. Science and technology network

3. China Education and Scientific Research Computer Network (CERNET)

4. China Jinqiao Information Network (CHINAGBN) (merged into Netcom)

5. China Unicom Internet (UNINET)

6. China Netcom Public Internet (CNCNET)

7. CMNET (CMNET)

8. China International Economic and Trade Network

9. China Great Wall Internet

10. China Satellite Group Internet (CSNET)