Finally, I finished the JPA roadmap with this lecture. Personally, I had moved from Java backend development to Python backend development, and I wanted to go back to Java, so I had to study the changed Spring development environment again, and I was wondering how to study, and I found Younghan's lecture on Infraon, and that's how I ended up here. I had a gut feeling that the sample lecture content was extraordinary(?), so I ended up watching all the lectures(?) and I'm really satisfied. It was also a good opportunity to decide the direction of my development studies that I had been wandering around. Thank you.