The “child from the stars” is a perception that some people have of autistic children, and it graphically expresses how lonely the inner world of an autistic child is. They never care about outside people or things, and they won’t even make eye contact with you, as if it’s only his own inner world. This shows how scary autism is. Autism is mostly caused by abnormal brain development, so autism is a congenital disorder, and no mechanism of its pathogenesis has been found yet, and there is no effective way to cure it. These children with autism are usually found after the age of 3. However, the age of appearance of autism also varies from person to person, not always after the age of 3. It is important to know that normal children will start to express their emotions and make eye contact with people at around 6 months, start to interact with people or things around them by making sounds at around 9 months, and start to babble and toddle at around a week old, which are all things that an ordinary These are all things that a normal child should have. Children with autism rarely learn things through hearing. They are very insensitive to language and do not seem to hear outside sounds, but their hearing is still normal, but they do respond to visual presentations. Usually, the younger the child, the more difficult it is to confirm the diagnosis, and it is usually around the age of 3 that there are clear symptoms to support the doctor in making a definitive diagnosis. But even in newborns, we can vaguely detect some abnormalities in daily life, such as being excessively quiet or crying, such as insensitivity to sound, etc. Children with autism are often different. At the age of 4 to 7 years old, parents and teachers will notice: 1) the child’s behavior is stereotypical and repetitive, with a narrow range of interests; 2) the child is self-directed and self-centered, often ignoring the instructions of teachers and parents; 3) the child is not good at verbal communication, is avoidant, has social difficulties, and some children often have conflicts and fights with classmates, etc. The best time to treat autism is from 2-6 years old. For parents, if their children show abnormal behaviors such as inability to see eye to eye when they are 2-3 years old, they should take their children to a specialized hospital early for examination and help them integrate into social life through scientific intervention and training.