Attention deficit disorder is also known as hyperkinetic syndrome, or ADHD for short. It occurs particularly in preschool children, with high activity levels being an obvious symptom. Attention deficit disorder is a syndrome characterized by hyperactivity, inattention, poor ability to participate in events, accompanied by cognitive impairment and learning difficulties, and basically normal intelligence. The WHO named this disease as hyperkinetic syndrome in the 10th edition of the International Classification of Diseases (ICD-10), and the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders, revised 3rd edition (DSM-Ⅲ-R) called it attention deficit hyperactivity disorder (ADHD).