This is not your average introductory course that just teaches you how to write code. It delves deeply into the philosophical background and technical implementation methods of Next.js routing, data fetching, and rendering. In particular, topics such as 'How is Next.js routing implemented?' and 'Why did the params of Dynamic Route change to a promise?' help you understand 'why' it was designed that way, not just how to use it. This is the only lecture that has clearly helped me understand the essence and optimization points of Server Components, as I was only using CSR with 'use client' in practice. I feel like I can finally use Next.js properly. I'm really looking forward to the next lecture!