At present, the face-to-face teaching time of offline training institutions is almost 4-6 months, which can make the zero-based Xiaobai quickly master the entry. Although the time is short, you can choose good training, because the training course focuses on learning. Teachers have perfect training courses and their own teaching methods and ideas, which makes it easier for students to master and understand thoroughly. Self-study behind closed doors may take years to learn, and what you learn will only be superficial, so it is difficult to learn the essence.