For sale. The sales channel of teaching materials should be the formal channel designated by the government. Zhanjiang Xinhua Bookstore, as a regular bookstore, has the obligation to sell compulsory education textbooks. As a regular bookstore, Zhanjiang Xinhua Bookstore should have the obligation to sell compulsory education textbooks, and consumers also have the right to ask them to fulfill their obligation to sell compulsory education textbooks.