I think there are differences in the difficulty, quantity and types of questions between Wang Chaoxia and Huanggang junior champions. Wang Chaoxia's topic is relatively difficult, suitable for those students who have a good foundation and want to challenge themselves. Huanggang champion pays more attention to mastering basic knowledge and is suitable for students of all grades.

For the fourth-grade students, Wang Chaoxia's topic may be too complicated to understand. Huanggang synchronous training is simpler and easier to understand, which can help students better master the content of teaching materials.

In a word, "Wang Chaoxia" and "Huanggang Junior Champion" are both excellent auxiliary teaching materials, but their applicable objects and characteristics are different. Students can choose suitable teaching materials according to their learning needs and ability level to improve their learning effect.