Invisible braces in the modern sense has developed for more than 20 years, and its technology is very mature, so you can safely choose. If you are in Beijing, medical resources are very rich. Peking University Stomatological Hospital and Beijing Stomatological Hospital are authoritative third-class first-class hospitals to choose from, and private clinics such as Saide Sunshine, Xiaoxiao Institute and Happy Stomatology are also good choices, depending on your needs. If you are satisfied with my answer, please adopt it.