Advanced 2.. There is really a lot of content and code.... The amount of content to review has increased a lot. It was a really valuable experience to develop a web server myself. As the structure grew bigger, I couldn't understand it all at once with my limited brain. How do you write such code....? I respect you. I will review the parts I don't understand and start Spring with excitement. Thank you for the great lecture! (I will definitely listen to Advanced 3 when it comes out.)