I am a junior developer in my 4th year. At my first company, I did not know the theory and only did the practical work on my own. However, while changing jobs, I studied the roadmap and learned the theory, and I came to know why I use it and that there are better methods. I have attended other people's lectures, but your lectures are easy to understand, and you explain the important parts exactly, and it is so fun to see you promote JPA books from time to time. Also, when I have questions unrelated to the lectures, you answer them really well, and I am so grateful. I will continue to study hard and buy JPA lectures and books to read. You are the most helpful teacher in my heart. Thank you very much. Please take care of me in the future.