Not only Chinese learning machines, but also many early education products. Perseverance is very important, because children are impetuous and easily distracted. Chinese studies can help them concentrate, and they are often played to cultivate children. According to Freud's subconscious theory, children can unconsciously remember China's classics and poems in their minds. This kind of memory can basically reach the point of permanent memory. If you listen to children's advertisements, they will remember them. You show cartoons to children, and they recite lines; When you listen to the gifted children's Chinese learning machine, they will recite the classics.