First of all, in the part where there is no sound... I think it will be hard for those who don't know much to understand. I bought it without knowing that there was no sound because I wanted to see how to use parts like hilt... There are subtitles, but they are a bit poor.. The source codes are also taught by pasting and pasting codes uploaded on GitHub (without any explanation), so honestly, it feels like I just paid for the codes.. I think it would have been better if they had put a little more money on the lecture and made it a lecture with sound. I think it was really good that I was able to experience Clean Architecture. I look forward to the future lectures with Ansop Woohwa's voice.