1 The sound was heard in a certain lecture, then it got smaller and then bigger. 2 There is a lecture that skips over it without even checking if the result was derived well. An error occurred, but the result was not good, so I went back to the lecture and just skipped over it to see if it was an error. From the perspective of a first-time viewer, I wasted 3 days trying to solve it. You made a second and pretended to open the conclusion site, and then migration? It worked and the lecture ended. I got angry here. Ha.. If I had seen the lecture in 2019 that cost 30,000 won, I would have liked it, but I paid for another lecture and watched it, and it was much better than this. Rather than being too basic, you should just do the core things that are shown in the result, but if you want to quickly learn the form, I do not recommend the lecture. No, if you want to watch it from A to Z, watch it once. It is a fast era to ask GPT while following the process of quickly completing a project. I didn't like it.