Newborn hearing screening time: 1, the initial screening process (initial screening): that is, the newborn 3-5 days after birth during the hospital hearing screening. 2, the second screening process (re-screening): that is, within 42 days of birth, the infant initial screening did not “pass”; or initial screening “suspicious”; or even the initial screening has been “passed”, but belong to the hearing loss of high-risk children such as intensive care unit children. The second screening process (re-screening) is required for infants who do not pass the initial screening within 42 days of birth, or whose initial screening is “suspicious”, or who have “passed” the initial screening, but are at high risk of hearing loss, such as children in intensive care units. Infants who do not pass the re-screening should receive an audiological and medical evaluation at 3 months of age to ensure that the presence of congenital or permanent hearing loss is determined within 6 months of age so that intervention can be implemented. That is, children who do not pass the rescreening should undergo an otolaryngologic examination and otoacoustic conduction, otoacoustic emissions, auditory brainstem evoked potential testing, behavioral audiometry, and other related tests, as well as medical and imaging evaluations to make a diagnosis, if necessary. For infants and toddlers who pass the newborn hearing screening but have risk factors for hearing loss, hearing follow-up should be performed at least every 6 months for at least 3 years of age, and audiological evaluation should be performed promptly if hearing loss is suspected.