It's hard ㅠㅠ I thought, 'I know a little bit now' while reviewing Java many times, but I felt a little bit of self-loathing because I didn't understand and just followed along while listening to this lecture... But after listening to the entire introductory lecture and watching the video explaining the entire backend roadmap again, I was reminded that there was a lot to study in the future, and that the overall picture was roughly sketched. Of course, I accepted that it was natural that I didn't know anything, and I made up my mind that I would absorb the next lecture well and learn. The gap between the Java lecture and the Spring introductory lecture was a little difficult, but I think that from the next lecture, they will explain it well like they did in Java. I'm currently doing a pure JDBC + Template in the Java national exam, and seeing this lecture solve it in one line in the interface... made me want to learn faster ㅋㅋ Thank you so much for the roadmap!!