There is a knack for entering the educational administration system. When I first opened the webpage, I could not get in because of a system error due to crowding. At this time, if you keep pressing f5 to refresh, you can't get in. The reason is that the network address has changed. You have to remove the last one ... cn and refresh it several times before you can enter it. Then you can click the user login, which is probably a system error. At this time, just stick to it. Click the user to log in, and then a login box will appear. Then you will log in here, and you may have to try many times. Then you can go in again, and then you will probably get a warm reminder. Hey, hey, is it depressing to come in? Don't mess around. At this time, refreshing is also skillful. Do not press f5 to refresh the entire interface. Once refreshed, it may be a disaster. The web page is white at this time. Right-click on the place to refresh or repeat direct elections, and don't fiddle around. Look down there. If you have a costume, you may stop and go in, but it doesn't necessarily depend on your personality. Finally, when choosing a course, you must choose one and submit it, otherwise it will be even worse. Finally, I wish you a successful course selection.