This was a great opportunity to refresh the scattered DB design theories I had learned from various certifications and separate DB theory studies. The content that didn't feel realistic when learning these theories became clearly understandable as Younghan showed various examples and shared practical experiences, explaining how they are utilized and how they should be utilized. Furthermore, I'm grateful that I was able to learn about modern design content through Younghan's lectures, which I had never heard of when learning these theories. I want to quickly listen to Design Part 2, but first I should go work on a personal project based on what I learned from Design Part 1. Looking at the reviews for Younghan's lectures, there are people who share good news (gained through the lectures), and I personally look forward to the day when I can also share good news. Personally, I think you look a bit thinner in the videos than before (this is just my personal opinion...), and I hope you stay healthy.