The computer of Shenzhen Cloud Education Resource Platform doesn't work. You should check whether your network cable is connected correctly. Then check whether your network is normal.

The stable network environment of PC or notebook computer may have no network signal.

Take the above situation, whether it is external access or your device connecting to the network. It needs careful inspection. It is learned from Shenzhen Education Bureau that students who want to study independently can get subject courses from Shenzhen Education Cloud Resource Platform with one click. It is reported that the Shenzhen Education Cloud Resource Platform covers all primary schools, junior high schools and senior high schools.