The grading method that is currently used more often in children with cerebral palsy is the Gross Motor Function Classification System (GMFCS), which is divided into 5 age groups based on the pattern of age-related changes in motor function limitations in children with cerebral palsy, with 5 levels in each age group. For example, the gross motor function grading before 2 years old is as follows: Grade I: Infants can accomplish changes between sitting and other positions and can manipulate objects with both hands free while sitting on the floor. Can crawl on hands and knees, stand up holding an object, and take a few steps while grasping and holding onto furniture.Children between 18 months and 2 years of age are able to walk without the aid of any assistive mobility device. Level II: Infants can maintain a seated position on the floor, but may need both hands for support to maintain balance. Infants are able to crawl on their stomach or crawl on their hands and knees. Infant may grasp objects to stand up and may take a few steps while grasping and holding onto furniture. Level III: Infant maintains floor sitting with lumbar support. Infants are able to roll over and crawl forward on their stomachs. Level IV: Infants have head control but require trunk support to sit on the floor. Infant can roll over from prone to supine and may roll over to prone. Grade v: Impairment of the trunk limits voluntary control of movement. Infant is unable to maintain an antigravity position of the head and trunk in prone and sitting positions. Infant requires adult assistance to roll over. Cerebral palsy in preterm infants should be carefully observed, detected early and treated early, and once any abnormality is detected in the child go to a regular hospital for authoritative diagnosis in time so as not to delay the condition.