There are a lot of new things to learn while listening, but I really like that parts that I vaguely knew are organized. When I first learned Servlet/Spring at the national academy, I was busy following the code, but as I listened to the lecture, I understood why the teacher wrote the code that way, so it was really fun. I usually just lie down after work, but because listening to the lecture is fun, I end up turning on the computer after work. Thank you, Younghan!! ㅎㅎㅎ