Calculate the fare that should be refunded according to the proportion of time or frequency. According to the Regulations on School Bus Safety Management, the maximum fees per student for general-purpose students within 4 km (including 4 km) from the school are 350 yuan, 4 km to 6 km from 450 yuan, 6 km to 15 km from 600 yuan, and 15 km (including 15 km) from 800 yuan. Students should calculate the fare that should be refunded according to their own situation. School bus refers to more than 7 passenger cars that are used to pick up and drop off students receiving compulsory education to and from school in accordance with the "Regulations on School Bus Safety Management". School buses for primary school students shall be designed and manufactured in accordance with the national standards for special school buses.