Mingming is 1.5 years old and will not look back when his name is called. By the time he was 2.5 years old, other children could already recite children’s songs, but Mingming could only say “daddy” and “hug” indistinctly, but not “mommy”. This is what the old people say, “the nobleman is late in speaking”, is it late for boys to speak? Ming Ming’s mom wondered in her heart, could it be that her child couldn’t hear her own words? With doubt, with panic, mom hid the family old man will bring the child to the hospital otolaryngology department to do a checkup, audiology and medical examination results came out: the child was diagnosed as “severe sensorineural hearing impairment”, low-frequency residual hearing. When Mingming’s mom realized that her child’s hearing could have been checked before the age of one, she really regretted it. Because the child missed the optimal time for speech development, it was much more difficult to learn to pronounce words and speak, and to carry out hearing and speech rehabilitation. Hearing impairment is a common birth defect. In normal newborns, the incidence of bilateral hearing impairment is about 0.1-0.3%, that is, for every 1,000 newborn babies there are about 3 children with hearing impairment. In many hospitals, it is already possible for babies to undergo hearing screening at 48 hours of birth to get an initial idea of their hearing. Newborns who do not pass the initial screening should be re-screened within 42 days. Newborns who are re-hospitalized within 1 month of birth with underlying hearing loss conditions (e.g., hyperbilirubinemia requiring blood exchange or sepsis with positive cultures) should also be re-screened for hearing before discharge. For those who still cannot pass the re-screening, systematic examination and diagnosis such as middle ear acoustic impedance, otoacoustic emission, auditory brainstem response, 40Hz evoked response, multi-frequency steady state response, etc. can be done in ENT and audiology within 3 months for early detection of the child’s hearing impairment.