1. Purchasing and compiling teaching materials: The National Open University will purchase and compile teaching materials after receiving the registration information of students. Including determining the type, version and quantity of required teaching materials, communicating with publishers or suppliers, and arranging the printing, binding and distribution of teaching materials, so it takes one month.

2. School handling and mailing: After receiving the student's registration information, the National Open University needs to carry out a series of handling work, such as verifying the student's information and handling the registration fee. At the same time, the school will mail the teaching materials to the students' addresses to ensure that the students can receive the teaching materials in time.