When learning TypeScript, it was always difficult to learn the theory and then apply it. So I ended up taking Zerocho's TypeScript All-in-One Part 1 to 2. In Part 1, I learned basic concept knowledge, and in Part 2, I was able to understand specifically how to use this concept in practice. In addition, I really liked how he organized the concept of the complex module system. I highly recommend it to those who want to develop their typing thinking skills after understanding the concept!