1. What is the early stage of schizophrenia? The early stage of schizophrenia refers to the stage before the appearance of typical symptoms of schizophrenia, which corresponds to the latent or prodromal stage of the disease, and is now also called the psychotic risk syndrome stage. 2. What are the manifestations of psychosis risk syndrome? Common symptoms can be summarized as follows: ① Mood changes: depression, anxiety, emotional instability, irritability; ② Cognitive changes: odd or abnormal perceptions, memory impairment, inattention, decreased learning or working ability, personality changes; ③ Perception changes of self, others and the outside world; ④ Behavioral changes: such as withdrawal or loss of interest in social activities, suspiciousness and sensitivity, decreased level of social functioning; ⑤ Somatic changes: such as the withdrawal of social activities or loss of interest, suspiciousness and sensitivity, decreased level of social functioning; ⑤ Physical changes. ⑤ Somatic changes: changes in sleep and appetite, fatigue, decreased activity and motivation. 3. What are the tools for screening and diagnosing psychiatric risk syndromes? The Structured InTerview for Psychosis Risk Syndrome (SIPS) is a diagnostic tool that not only assesses whether the interviewee has a psychosis risk syndrome, but also can provide important predictive value for whether they evolve into psychosis. 4. Do all individuals with prodromal symptoms necessarily develop psychosis? It is currently believed that not all people who present with prodromal symptoms will necessarily develop schizophrenia or other psychotic disorders, and whether they convert depends on the following factors: early interventions to improve the individual’s coping skills, family and social support, etc. 5. The significance of early identification of schizophrenia Schizophrenia that is detected early and interventions are taken in a timely manner has the potential to stop the development of the disease in time and maintain relatively normal social functioning. Therefore, the early diagnosis of the disease and early intervention are of vital importance.