There are two clinics in Dalian that are doing well, Dalian Oso Dental and Dalian Doctor Dental. There should be others, but I am familiar with these two families. In fact, the key to correction is not the hospital, but the doctor. Find a doctor with high medical skills and be responsible for your own correction results. Secondly, choose the right electrical appliances. There are various kinds of appliances now, including the traditional labial appliance, commonly known as "Kouga". This appliance is not very beautiful, but the correction effect is ok. There is also a kind of lingual invisible dental appliance which is very popular in recent years. Wearing it on the inside of the teeth, it can't be seen from the outside, and it has a completely invisible aesthetic effect, and it is customized. However, this kind of instrument has certain requirements for doctors' skills. The doctors in the two clinics I recommended above both made this product. You can consult. I hope I can help you! thank you