The 6 volumes of "The First Lesson of Thinking Training for Children's Convergence" (including Pinyin, Chinese characters, numbers and addition and subtraction training, learning books for the transition from kindergarten to primary school) can be used as family education books for young children of the right age, and can also be used as a book with certain needs. Independent study book for children at all levels of knowledge. In addition, this book has 48 sets of test papers to help children consolidate the basic knowledge of mathematics, pinyin, and language, comprehensively test children's knowledge and understanding level, and help parents guide their children's balanced development of knowledge.