I am a student who started studying Spring. At first, I started Spring by reading a book, but it was quite boring and I had many questions about why this part was created and why it was used. However, after listening to the explanation of object-oriented and the background of the birth of Spring in this lecture and making a simple project, I thought, 'Ah, this is why we use Spring'. Every time he explained Spring technology, he explained the background and things to be careful of in practice. Whenever he talked about practice-related things, I imagined myself developing in the future and felt good. I also felt that he put a lot of effort into writing the lecture materials. The best thing was that the instructor was always full of fighting spirit and seemed to enjoy filming, so I felt encouraged as I watched. Thank you.