1. online shopping: you can buy books on related secondary construction materials, such as JD and TB, on large-scale e-commerce platforms.
2. Physical Bookstore: You can go to a large bookstore or the bookstore of Education Press to buy books related to Erjian, such as People's Education Press Bookstore, Beijing Book Building, CITIC Bookstore, etc.
3. Examination counseling institutions or education and training institutions: You can go to a professional examination counseling institution or education and training institution to buy relevant materials for the construction of two books, such as painting education and Chinese public education.