The relationship between exception handling and DIP and OCP is a concept that Java developers must know, even if it is not Spring. I was able to learn a lot from this lecture. The story about systemizing life is something that Yeong-han often talks about, so it was something I usually try to do, and it touched me deeply again when he talked about it with passion. SpringDB Part 2 came out this time, so I am looking forward to learning more things and I am happy! Thank you for always creating great lectures :)