Developmental dislocation of the hip (DDH) can be detected and treated early if it is screened early, which is a good thing for the susceptible population and the whole society. At present, developed countries have developed a mature screening system in infancy covering the whole territory, but unfortunately, China has not yet developed a perfect system, and only in a few developed regions of large cities on a limited scale. Large-scale screening for DDH relies on 2 main tools: clinical examination and ultrasonography. Physical examination includes: hip abduction test, Barlow test and Ortolani test. Hip ultrasonography is a powerful complement to the physical examination and is recognized as an effective adjunct to screening for DDH in young infants, as it can detect DDH that cannot be diagnosed on physical examination. Screening is even more important for infants with risk factors for DDH. These risk factors include: breech delivery and other abnormal intrauterine positions; family history; combination of other anomalies such as oblique neck, clubfoot, and ectropion; multiple pregnancies, low amniotic fluid, large weight babies, and other factors that can cause intrauterine crowding. If a girl has a combination of these factors, she is more likely to develop the disease. Children with risk factors for DDH should ideally be screened 2 times after birth: within 1 week after birth and 4-8 weeks after birth. Each time a physical examination and hip ultrasound is required. Children who are screened positive for DDH need to be treated immediately, usually with a Pavlik sling. Early detection and treatment after birth (preferably within 4 months) is very effective and most recover to avoid lifelong physical disability. If parents actively cooperate with screening and treatment, your actions change your child’s life, and that is how much you love your child. Fortunately we have started screening for DDH in babies born in our hospital.