Listen to Chapter 9, Nodebird, with your teeth clenched. For beginners in coding like me, there is a lot of content that builds up basic knowledge in the beginning, so it can be a bit overwhelming. But if you review Chapter 9 again, including Nodebird and implementation details, and look up the content you forgot in the beginning, you will surprisingly understand the content quickly. I am not able to make any more progress in Chapter 9 because of the project period, but I will come back and write a review after persevering. Long live Zerocho