The spike of Cheng Weigao's mathematics is actually an extreme refinement and summary of the conventional solution, which is still a conventional method in essence, but the speed of use has been improved many times, and the effect is excellent. Other so-called skills are basically deceptive, divorced from the essence of mathematics, and skills are empty for the sake of skills. Look at the specific video and you will know how deep Mr. Cheng's math skills are, how pale other teachers' math skills are, which are true gods and which are nonsense. Watch the video carefully and you will know. Your own eyes are the only criterion for judging!