# Class billing rules
[中文](/books/68d30/page/49182)
The free traffic subsidy policy for the class course function will be terminated at 0:00 (GMT+8) on January 8, 2022, and the official charging will resume.
The following are the latest charging rules:
The class course traffic fee is charged according to the class type:
**1. Billing rules:**
The fee for a single class = the total actual class duration x the unit price of the class type
For example, if there are 20 students in a class, the class type is 1v6, and the class duration is 30 minutes, i.e., 0.5 hours
The total actual class duration = 20 x 0.5 = 10 hours
The fee for this class = 10 x 3 = 30 yuan
**2. Special benefits:**
The fee for a single class is capped at 200 students. The part exceeding 200 students will not be charged!
**\* Notes:**
1. The fee is charged according to the actual learning duration of students. No fee will be charged if the class has not started or the student has not entered the classroom;
2. All students in the classroom need to be charged regardless of whether they are on stage or not;
3. The consumption record of each class will be generated after the class ends. Merchants can view the details on the account page of the management background;
4. If the class ends late, the fee will be charged according to the actual class duration;
5. Teaching assistants who enter the classroom will also consume a certain amount of traffic fees, and their billing rules are the same as those of students.