Oh my, I love it so much ㅠㅠ In the past, when I was studying on my own on YouTube, I felt like I couldn't organize my thoughts, but after listening to Younghan's lecture, I'm starting to organize my thoughts ㅎㅎ!! I haven't listened to everything yet, but I want to hurry up and finish it! Thank you always for the great lectures. I'll work hard until the JPA lecture!!