Learn to recommend experienced doctors to take you with you. The speed of entry varies from person to person. It is very important to find a good teacher. It doesn't matter if the tuition is more than a few thousand. Earn it back after learning the technology.

The most important thing is to have a solid foundation. Familiarity with anatomy determines the safety of your operation, and cognition of aesthetic design determines the quality of your operation.

Generally speaking, injection and line carving are not difficult. As long as you are careful, the information I have compiled can also be used for reference.