I did it in the city hospital of traditional Chinese medicine. The dentist is now working on the third floor of the outpatient department of Hu Yong Road (that is, Yiguang) and has a good attitude. Many students did it there. At that time, I corrected two rows at the same time, and the effect was good.
By the way, some doctors say that all permanent teeth can be corrected, so orthodontics should be done as soon as possible. The effect may not be very good when you are old.
The above are purely personal opinions and are for reference only. Please consult a doctor for details.