If you are a normal person, but you are arrested in a mental hospital, how can you prove that you are not crazy? In this world, there are ten types of mental illness, with more than 400 kinds. According to statistics, among the nearly 1.4 billion people in our country, The number of people with severe mental illness is 18 million. The number of people with moderate and mild mental illness is 120 million people. The number of people with mental problems is - 300 million. How do you prove that you are not a crazy person?