Orthodontic technology is very high. Undergraduate students do not have this major, and only masters or doctors will have orthodontics. For a doctor with a bachelor's degree in stomatology, it is difficult to do well without a year's advanced study experience and a certain number of years of clinical experience (except for common simple cases, of course). The workload of small clinics is not large, and generally there is no such doctor with sufficient correction experience and can't afford it. Therefore, to make corrections, we must first rule out small clinics (of course, some clinic owners and doctors themselves do corrections). The above is the experience of orthodontists in our unit, and Bian Xiao presents it here.