1. Teacher Liu Xi has rich clinical experience and teaching experience, has a deep understanding of the essence of orthodontics, and has a lot of original technologies to help you improve the effectiveness and efficiency of orthodontic treatment.

2. Integrate the principles of project design into students' thinking, including the problem of tooth extraction that patients often worry about. And share the skills and experience of communicating with patients, so that patients can accept the design scheme more easily and achieve better correction effect.

3. During the whole course, orthodontists had a lot of interaction with Mr. Liu, and the learning atmosphere was positive and enthusiastic. Every oral colleague keeps putting forward his own questions and opinions. Under the personal guidance of Mr. Liu Xi, every orthodontist has benefited a lot in this process.