Last December, I took the 'Java Introduction' lecture slowly and took the 'Spring Basics' lecture, but I am currently taking Kim Young-han's Spring lecture from January 2nd to properly understand the backend. This is already the 5th lecture I have taken this year. I am currently taking the Spring Data JPA lecture, and I want to listen to only the practical! Querydsl lecture and create the application I want. When I first started, I had no idea how to start the backend, but as I listened to the lecture, I learned the content I already knew, and the lecture speed increased. Thank you so much for making such a great lecture.