I don't know the online and offline details of Beijing Dark Horse programmers. But basically the difference between online and offline is as follows: 1. Learning styles are different: offline learning is mainly taught in the classroom, with teachers present to guide learning, while online learning is mainly conducted on computers or mobile devices, so autonomous learning is very important. 2. Different learning effects: offline learning can get more full interaction and feedback and answer questions in time. However, due to time and space constraints, you may not hear the experience shared by industry leaders in other regions or countries, while online learning can obtain global learning resources and information, with high flexibility, but lacks opportunities for face-to-face communication. 3. Different learning choices: offline learning will generally stipulate the course content and learning time, while online learning can choose the courses that interest you, and spread the time to study, with higher freedom. 4. Different learning environments: offline learning needs to go to schools or training institutions, and it needs certain places and facilities, while online learning can be conducted at home or anywhere with Internet, which is more flexible, but it needs certain self-control and punctuality. In a word, offline learning and online learning have their own advantages and disadvantages, and which way is more suitable depends on individual learning habits, learning goals and resources.