The advantage of publicity is that I won't run for office. I have been to many units before, but it is difficult to register with many people, the price is high and the service is average. Finally, I chose the specialties of Kangyuan Orthodontics, Guangzhou, Shenzhen, Nanjing, Xiamen and Hangzhou. It is more convenient for me to review on business trip, and the total price is one of the reasons I chose. Other places have given approximate prices, which is terrible in the face of the unknown.