Reason: Adjust the progress or playback speed during class, suspend class for too long, the system is stuck or the browser is incompatible.
Solution: If individual courses do not accumulate time or the credits are not displayed enough, you can check whether the lecture time is consistent with the courseware time. If not, students are advised to click the lecture button after this section to make up for the missed time. If you confirm that you have listened to all the courses in this part, students can click on the course again and listen for about one minute. If the cumulative lecture time exceeds the class length, they can successfully jump to the "Completed" page.
If the above operation still fails to solve the problem, you can also try to log out of the personal center and log in again, or change your browser to attend the class again.