The instructor's previous lectures were good, so I came to this lecture right away. I had some time during the Lunar New Year holiday, so I was able to attend the lecture to some extent. I think this lecture will be a great help to beginners who are familiar with the Java language and now want to build a solid foundation in backend. Since I took the instructor's previous lectures with interest, I knew a little about backend development, so this lecture content felt a little easy. When I think about it from the perspective of when I first learned development, I felt that he explained it very well with appropriate analogies. This lecture covers everything from start to deployment, so it helps to build a solid foundation in one lecture. As a TMI, what impressed me this time is that the 'book management application' used as an example in the lecture was also used in the previous lecture. If the previous lecture was about refactoring a 'book management application' that was already somewhat created, this lecture contains the process of creating the 'book management application' from scratch. I think it's probably the instructor's big picture, lol. After taking this lecture, if you take the instructor's previous lecture, you will be able to gain experience as a backend developer by following the migration to Kotlin, refactoring, etc. I look forward to future lectures~