The teacher asked us to watch the TV lecture by Professor Yu Dan at 8: 30 on Sunday morning. I turned on the TV curiously before the time.

Teacher Yu Dan first talked about happy life and happy study. Not for parents and teachers. In a word, she said, "Knowing is not as good as being kind, and being kind is not as good as being happy." We should study with interest, so that we can master knowledge easily and happily. Secondly, she also said not to give up easily. Frustration is an inevitable growth experience in our life, and only after being tempered by setbacks will we become more mature. If you give up difficulties and study, you may give up life over time. That's quite right. Nowadays, TV and newspapers often report that some primary and middle school students commit suicide by quarreling with their families, teachers or classmates because of trivial matters. Therefore, we should learn self-control, know ourselves and others correctly, keep ourselves in a happy and simple state, repair ourselves in adversity and grow up happily.