1. According to the query of China Education Network, network problems: the webpage cannot be opened due to unstable network and weak signal. Change the network environment or try to operate with other devices. Education bureau examines high school student status.

2. System maintenance: Sometimes the platform needs system maintenance and update, which will also make the webpage inaccessible. Later, I tried to visit the website of the Education Bureau to check my high school status.

3. Browser compatibility problem: The browser does not support the display and operation of the current webpage. Change the browser or upgrade the browser version, and then try to visit the Education Bureau to view the high school student status page.