Is Hao Ying's post-film training class really reliable?

It has been a long time since the late photography class, and I feel that the teacher is professional and profound, with concise language and clear expression. Especially for students with zero foundation, it is not too annoying to unify and not discriminate. I am a zero-based student. Through training, I have increased my understanding of photography and the later stage, and learned that the basic idea of color matching is to light and shadow before color. The teacher really gave the students all the experience he had summed up over the years. Each lesson is a summary of the essence, which is worthy of being followed by photographers or beginners.