Mr Huai Tesen is a teacher with great personality, but he can teach students more. He let them know that no one can know the truth. In life, there are mistakes in books. If you think about it, maybe mistakes will come quietly. If not, you are wrong. Teacher Huai Tesen let the students know that authority does not mean right. If you doubt, argue. Don't listen to the wind as rain. Books and authority are not always right in life. In fact, nothing is always right. Once found, it is necessary to bring it up to prove that it is right or wrong. If there are mistakes in your book, will you bring them up? If you find an authority that may be wrong, will you explore and discover it? I don't know what choice you will make, but Mr. Huai Tesen teaches students to propose, explore, discover and prove everything with facts. Mr. Huai Tesen gave them the courage to stick to the truth, making exploration a consistent style, and truth followed.