Thank you, instructor Kim Young-han, for always creating the best lectures. Backend is a field that I am studying for the first time, so I am unfamiliar with it and I think I wandered around a lot. Especially, the Spring introduction ~ basic stage was very difficult, but I think I am gradually getting the hang of it through review and review. I will study the areas that I am lacking more and try my best to go all the way to the development stage by taking the backend course.