After thinking about it, I read some materials on the Internet, which changed my view. I felt that these things were really useful. Otherwise, how could they be so popular in the market? It’s not too late to look back. It’s necessary to consolidate what I’ve learned, so I decided to conduct a comprehensive large-scale military exercise. To tell you the truth, it’s a good thing, but it also needs time cost. It certainly can’t all be used. Instead, it’s self-contained. In the past, I always thought that if I knew more, I would get a high salary. That’s right. I have to understand a lot. A lot of things are useful. In a word, I’m going deeper and deeper in the front end. Maybe my ideas will change after a few years, but today’s road is right.