On the one hand, it is to ensure that the learning time and content of the students are true and effective. After the students finish the class, the school or relevant institutions will review the students' learning records to confirm the authenticity of the class. This can prevent students from deliberately falsely reporting class hours or committing other violations. On the other hand, the learning software used by some driving schools stipulates that the learning duration of each class should not exceed 30 minutes, otherwise it will not be uploaded. This is to encourage students to study efficiently and avoid students just browsing the learning content without really absorbing knowledge. If each study exceeds the specified time, the system may not upload it. So if your class shows that you didn't attend the training, I suggest you wait for a while, and the system will review and update your study record. At the same time, please ensure that the study duration of each class is in accordance with the regulations, so as not to affect the uploading and review of class hours. If the problem still exists, I suggest you contact your driving school or training institution for their help and solutions.