It's true that seeing once is better than hearing a hundred times. The Chinese idiom "seeing once is better than hearing a hundred times" is exactly right. Since you draw the internal structure of the code with pictures and explain it one by one, it's really easy to understand. I wonder why there hasn't been a lecture like this before. I will listen hard and learn well. Thank you for creating a good lecture that helps me understand difficult content. You will continue to upload good lectures, right? ㅎㅎ I will look forward to it. Thank you.