The most important clinical manifestations of schizophrenia are probably the following: first, hallucinations, verbal hallucinations are the most common, and hallucinations of vision, smell, touch, and visceral hallucinations are also seen. Second, delusions, the most common ones are relationship delusions and victimization delusions. Patients feel that every action of people around them is related to them, for example, others spitting are spitting on them, others whispering are talking about them; patients have a sense of being followed and watched, and even suspect that someone is trying to harm them, suspecting that they have poisoned their food and water. Third, the disorder of associative thinking, the patient’s inner feeling of being exposed or inner feeling of being controlled, and the performance of thinking clouds. Fourthly, there are obvious behavioral disturbances and catatonic behaviors, the patient may have a variety of absurd, bizarre, and silly behaviors, and may also have a state of catatonic rigidity. Fifth, negative symptoms, i.e., emotional flatness or indifference, lack of speech, and loss of volition.