Hello. As you mentioned at the end of the lecture, while working in the field for 7 years, I was simply busy finding and solving problems as they came up, and I lacked concepts and confidence in the technologies I was using. Others may know, but I was working without a perfect understanding, as Younghan said.ㅠㅠ Even after searching the spring.io site and reading all the docs, I had a hard time understanding the servlet concept because it wasn't perfect. When I first purchased all the lectures, the tuition was burdensome, but since I started taking the lectures, I feel like I've gained more valuable things than the tuition. Thanks to Younghan Kim's valuable lectures, I think I can now understand the structure of Spring a little bit. And as you said, I think I can add more flesh to what I understood and build up my knowledge quite solidly. I've quit my job and am studying hard while taking Younghan Kim's lectures during my gap year. Thanks to you, I think it will be a great help in preparing for a job change. I'm so grateful and I'll listen to the remaining lectures. :)