Teacher Liu focuses on inspiring our thinking in teaching. He is good at summarizing problem-solving methods, techniques, and rules. He uses easy-to-understand language to help us master difficult knowledge points, cultivates independent thinking in problem-solving strategies, and instills core mathematical literacy, allowing us to experience the rigor and flexibility of mathematical thinking. He has enabled us to transform from being afraid of mathematics to loving mathematics and taking the initiative to learn mathematics. Everyone's mathematics scores have generally seen a qualitative leap.