(The application for a salary increase was politely rejected by the leader on the grounds of lack of ability. He wanted to enter the front-line factory, but after every interview, there was no news. Before, I wanted to improve, but I didn't know how to learn. Scattered and unsystematic learning is very inefficient. I wanted to follow the trend and develop towards the full-stack Web, and I made a set of learning plans, but I gave up halfway because of busy work, poor self-control, no one to lead, and lack of learning atmosphere. If you have the above problems, then this course will be the best course for you. Good choice.)