1. According to official website's inquiry, Zou is experienced, firmly believes in entertaining, is good at plot teaching, and has infected many students and parents with his humorous and enthusiastic teaching style. Long-term participation in item bank editing, handout writing and other teaching and research work, good at grasping knowledge points, and committed to establishing a complete mathematical system. He independently produced a video column about the secrets of intermediate computing.

2. Sun Xiaoyan: He has six years' experience in education and psychology, and has mastered scientific parenting concepts and educational methodology. As a representative of grades, I have held many parent lectures for parents of all grades to convey high-quality parenting concepts to parents and teachers. I have been a teacher trainer and trained many new teachers. Rich teaching experience, familiar with the pain points and difficulties of children's mathematics learning, open up mathematical thinking, and won many honorary awards from teachers.