The research methods are divided into sightseeing research, experiential research, immersion research and mixed research. Sightseeing is like the previous spring and autumn tour, except that the travel agency or organization changed its name, and now it is basically unpopular. Experiential learning needs practical experience, pays attention to hands-on experience and lacks theoretical reinforcement. Immersion means immersion in the scene of the subject, theoretical reinforcement learning, emphasis on scene perception and theory, and lack of hands-on training. The mixed mode is the combination of two or three of the above three modes, and it is also the most popular mode, and it is also the most complicated and tested way for the undertaking unit.