(1) Liu Haiyang has violated the criminal law. The bears in the zoo have lost their wildness. These bears are just a property of the zoo. So Liu Haiyang committed the crime of damaging public and private property (although there are different views, this view has become the mainstream view). (2) The bear injury in Liu Haiyang shows that some young students are lacking in mental state and personality. Therefore, in addition to criminal punishment, the perpetrator should also make remedies through introspection and concrete actions. (3) People with high academic qualifications and high IQ do not mean that they have excellent personality and full human nature. Therefore, we can't ignore the cultivation of moral education. We should reflect on the education system, social environment and cherish life.