Randomized, Controlled Trial of an Intervention for Preschool Children With Autism: TEACCH

Inclusion Criteria: * diagnosed by two children's psychiatrists above the level of the attending physician, in accordance with the diagnostic criteria of DSM-V (Diagnostic and Statistical Manual of Mental Disorder, fifth revised) children's autism spectrum disorder issued by the United States in 2013. Diagnostic screening scales include Autism Behavior Checklist (ABC), Childhood Autism Rating Scale (CARS), and Modified Checklist for Autism in Toddlers (M-CHAT) (for under 4 years old), Social Communication Questionnaire (SCQ) (for over 4 years old), all children' scores above the scale suggest ASD performance; * able to cooperate with clinical evaluation and related examinations, and the guardian signs the informed consent to agree to participate in the study. Exclusion Criteria: * combined with other mental illnesses such as ADHD, with major physical and nervous system diseases; * serious self-harm.