Instructor Kim Young-han's lectures seem to be the best. When I first learned Spring at a national academy, I learned a lot of things that I didn't understand in terms of principles. For example, when only the logical name is returned from the controller, I was really curious about how Spring processes it, and the process of transferring it to the front by just putting it in a Model object. I feel refreshed after listening to this lecture. I have one question. Is it more appropriate to use JPA than myBatis? I learned JSP, SPRING, myBatis, etc. at the academy.. I think I should learn JPA if I want to avoid being eliminated and see the future. I am currently preparing for employment as a developer and contacting companies. Can you give me some advice?