I am a second-year developer. I am currently developing in C# at my company, and I took this course while continuing my personal studies to move to a Java company. As a result, I am very satisfied. I have never seen a project of this quality while looking at JPA books on the market. Although it is a long-term course, I think that Baek Gi-seon, who prepared the course, must have spent more time, so I am taking it in stride. Of course, I could not fully digest the course. However, I was able to learn that there is a way to develop in this way, and that this can be changed in this way. Thank you for the great course. At Infraon, the title of knowledge sharer is used rather than the title of instructor, and I am truly grateful for sharing your valuable knowledge.