First, convince parents to set a good example through some examples:
Plastic surgery is a hot topic in modern times, and most people can't accept plastic surgery, which is a very fashionable thing. After all, a person's appearance is innate, and it is really hard for the older generation to change it casually. So if you want plastic surgery, you need to find some examples to make your parents accept your point of view. For example, we can find some celebrities whose success after plastic surgery should greatly affect your parents. You can find some successful cases from the entertainment circle, and you can also find some successful cases from people around you. These things can affect parents, and patient communication will have good results.
Second, from the benefits of work and study, convince parents:
There is a big generation gap between parents' ideas and children's ideas. After all, there was no such thing as plastic surgery in their time. So it's natural that parents can't accept plastic surgery. We can try to convince parents from the perspective of modern people that they have a good face value, can do a better job and study better, so that your parents will gradually accept it. Of course, it takes a process, and so do you, to show your determination and wisdom. The above methods are more effective for parents, because they all want their children to have a smooth career and progress in their studies. If you start from these aspects, then your parents should agree to your plastic surgery.