1. Synchronous tutoring for primary school Chinese: This book is based on primary school Chinese textbooks, and its contents are synchronized with the textbooks, including text analysis, vocabulary explanation, exercises, etc., to help students better understand and master Chinese knowledge.

2. Synchronous tutoring of primary school mathematics: This book is based on primary school mathematics textbooks, and its content is synchronized with the textbooks, including knowledge point explanation, examples and exercises analysis, to help students consolidate their mathematics foundation and improve their problem-solving ability.

3. Synchronous tutoring of primary school English: This book is based on primary school English textbooks, and its content is synchronized with the textbooks, including the pronunciation of words, the explanation and practice of grammar, to help students improve their English listening, speaking, reading and writing skills.

4. Synchronous tutoring of primary school science: This book is based on primary school science textbooks, and its content is synchronized with the textbooks, including experimental demonstrations, knowledge point explanations and exercises to help students cultivate scientific thinking and experimental ability.

5. Synchronous tutoring of primary school history: This book is based on primary school history textbooks, and its content is synchronized with the textbooks, including the explanation of historical events, the introduction of characters and exercises to help students understand historical knowledge and cultivate historical consciousness.

These synchronous counseling books are written and reviewed by educational experts, which are rich and accurate and suitable for primary school students to read. They can help students better understand and master textbook knowledge and improve learning effect.