The first book is Huanggang Junior Champion, which is used as a unit test paper in our school. I bought a primary school textbook, practiced all the time, sprinted for the final 100, loved to write homework, 53 straight-a papers, and compared it with Huanggang's small champion micro-test. Among them, it is too simple to sprint to the end of the semester to love me; Primary school textbooks are all practiced well, but on the whole they are a little worse than 53 straight A. Huanggang small champion micro-test is also good, a 20-minute paper, with prominent focus. In addition, Huanggang has an error-prone math problem, which is very good!