Because the spine problem is a big problem that puzzles people, as long as you are human, there will be spine problems. From the market point of view, it is of great value. Some people have done a good job in spinal treatment and earned a lot of money. The problem is that there are not many people who really master chiropractic technology, and only a few people can rank first in the country. The market is big, so many people want a piece of it, even if the technology is limited. If you want to study, you must find a formal institution. Whether it is theoretical knowledge or practical technology, you need to have some reserves and training. Song's one-time reduction is a clinical practice teaching. After learning the theory, I will take you to practice. After learning, you can go on your way.