Hello, Donghaebada. I'm glad it was helpful. I'm sorry about the length of the lecture. Let me make a small excuse. As a student, I also felt sorry for the lectures that were unnecessarily long because I kept repeating similar things every time I listened to online lectures, so I tried to prepare my lectures as short as possible but with substance. I intentionally removed all unnecessary parts through cut editing. I also continued to re-record parts that I felt were difficult to explain or too long. I thought that would make it easier for students to understand. Although the Ladies' lectures are less than 2 hours long, much more time, effort, and sincerity went into them. Of course, it's an effort that should be made as a paid lecture provider, but I wrote a few words out of concern that you might think I'm just trying to make a lot of money with short lectures. Nevertheless, I sincerely thank you for choosing my lectures!