Finally.. I'm done ㅠㅠ I studied AOP with books on the market, but I only knew about the word proxy and many trials and errors, and I've never seen test code from this low level What I knew was not what I knew I wonder what it would have been like if I had studied proxy and AOP for the first time with this lecture. The previous JPA series was really impressive, and I watched this advanced version at dawn without realizing how much time had passed. I'm really looking forward to the next DB series!!! Thank you