1. Appointment of follow-up appointment for each patient is to ensure that the physician has sufficient time for each patient to carry out orthodontic design and adjustment of orthodontic appliances in order to ensure the quality of treatment. Therefore, the patient should follow the appointment time of the supervising physician on time, and if he/she fails to follow the appointment on time for any reason, he/she should take the initiative to contact the supervising physician to reschedule the appointment, so as to avoid affecting the efficacy of the treatment, prolonging the course of the treatment, or experiencing any undesirable side effects. If the patient fails to attend the follow-up appointment without any reason for more than three months, it will be regarded as automatic termination of the treatment, and the patient will be responsible for all the consequences. 2.After wearing the aligners for the first time and after each follow-up appointment, mild pain, mild loosening and oral mucous membrane ulcers may occur, and the symptoms can be alleviated or disappeared within a week or so. If other serious discomfort occurs, please contact the competent physician as soon as possible, in order to deal with possible abnormalities in time. 3.Patients should pay special attention to oral hygiene during orthodontic treatment. After each meal, teeth must be brushed, and the soft scale on the teeth and the retained food residues should be brushed carefully, otherwise it is easy to cause gingivitis, periodontitis, decalcification and caries, which will affect the orthodontic treatment and the oral health. For patients with very poor oral hygiene, we will have to terminate the treatment in order not to affect oral health. 4, in the orthodontic treatment process, can not eat hard, sticky food, such as gnawing bones, fried chicken, crab and other foods, large pieces of food cut small before eating, so as not to damage the aligner. If you find that the orthodontic appliances are damaged, such as brackets falling off, loosening of the band ring, breaking of the arch wire, etc., you should contact the competent doctor in time and make an appointment to deal with it in a timely manner. Frequent damage to the orthodontic appliances will seriously affect the normal progress of orthodontic treatment, so that the course of treatment is prolonged, and additional fees will be charged. 5.Orthodontic treatment is an investment in health and beauty, and its cost varies according to the degree of deformity, the type of orthodontic appliances, the degree of cooperation of the patient, the age, the course of treatment, etc., so please consult with your competent physician for specific charges before deciding on the treatment. In the course of orthodontic treatment, if special orthodontic appliances and additional devices are needed, corresponding material fees will be charged, such as: rubber band, extra-oral bow, J-hook, anterior traction device, skullcap, chin pocket and so on. 6.The good cooperation of patients in the process of orthodontic treatment is the key to the success of orthodontic treatment, patients should wear the orthodontic appliance and its additional devices (such as traction rubber ring, etc.) strictly according to the doctor’s instructions, and master the correct wearing method and wearing time, otherwise it will seriously affect the effect of orthodontic treatment. 7, the correction of malocclusion is a biological reconstruction process, the course of treatment is longer and with the patient’s age, the severity of malocclusion, treatment methods, materials and patients in the treatment of the degree of cooperation and so on have a close relationship. Generally, it takes 1~3 years, and longer time is needed for special and difficult cases. After removing the aligner at the end of the treatment, it is necessary to wear the retainer for about 1~2 years, and individual difficult cases need to keep it for a longer period of time, or even for the whole life, in order to prevent recurrence.