I am a web map-based professional. I am using Spring MVC to provide map-related services. In fact, I joined the company without knowing anything about code from the beginning, and it has been 5~6 years already. In a way, I grew up in the wild without any weapons or clothes, and I am still doing it now. As I continue to work in the field, I was looking for ways to make the code more concise, simple, and easy to develop and maintain, and I came across this lecture. I have grown up in the wild so much that I don't know exactly what this is, but I have always solved problems and code with the feeling that this will work, so watching the lecture makes me feel like I am looking back on what I have done so far. At first, when I first came to the wild, I felt like I had no weapons, but now I feel like I am in the wild wearing clothes and weapons? Haha It has been 15 days since I watched the lectures in order, and I have finished the introductory and basic sections, and now I am going to learn basic web knowledge. I am not the type of person to leave evaluations, but I am writing this because the course reviews are a great help. Thank you for the great lecture and I hope you always have good things happen to you.