Hello, Younghan, I've been listening to your lectures since Spring! It's been a year since I got a job as a backend engineer, and every time I listen to your lectures, I feel that I lack a lot of basic skills, and I'm learning a lot! I always say, "Wow, that's why!" while listening! You must have been tired from making long videos, but thank you for always teaching with such good tension! I'll run through the rest of your lectures and run to a higher place. Thank you! :)