Relying on the textbooks produced by Zhou Fang, the textbooks have no ISBN, and some pictures have no copyright. The platform known as the education channel for 0-99 years old is left. It seems that many college entrance examination cards are copied from other institutions, which should be similar to one card. No one has this title. I tried to join the reform in Chinese composition, but failed. The quality of teaching materials is relatively poor, and I can't do it later. Not recommended.