I know there are activities, fixed and invisible. The invisible ones usually start at 1 10,000 yuan or 20,000 yuan. The corrective technique that feels better is in the oral cavity of Dongzhou Carnival near Dongzhou New Mart. My children do full mouth correction here, and the fee is reasonable. There is no extra charge for the whole journey. I am also very satisfied with this. Other hospitals charge fees every time they go, ranging from a dozen dollars to several hundred dollars. There are also doctors and nurses who are patient and children like them. The environment is better. The large-scale dentistry on the upper and lower floors is trustworthy. Baidu can find it at Fushun Carnival.