The child experienced convulsions after a fever, accompanied by brief periods of rigidity in the limbs, upward rolling of the eyes, and clenching of the teeth. During these convulsions, the brain can suffer from ischemia and hypoxia, leading to the death of some brain cells. Currently, the child can only speak in simple terms and has difficulty walking with strength in their hands and feet, easily falling. The symptoms are not severe, but the current treatment does not seem effective. However, I predict that the child will not have any serious issues; the damage is minor, other brain cells will compensate, and with his own training, the child will be like a normal child.