In China University, the duration of a class is usually 45 minutes, which is based on the requirements of the national education department for the teaching norms of higher education. Different subjects and different types of courses may be different, but they are generally calculated in 45 minutes. In addition, some experimental classes or practical classes may be arranged, and the length of time may be different.

In class, students should also listen carefully, take notes, actively participate in classroom discussion and interaction, and improve the learning effect.