Investigation methods include interviews with local music practitioners and enthusiasts, on-site observation and recording, and literature and data research.

1. Interview local music practitioners and enthusiasts: You can communicate and interview with local musicians, singers, musical instrument producers, etc. to understand their understanding, opinions, and opinions on folk music in southern Henan. Experiences and stories, etc., to obtain first-hand materials and information.

2. On-site observation and recording: You can go to southern Henan to observe local music and cultural activities on the spot, record the characteristics and features of southern Henan folk music in terms of performance methods, repertoire, dance, etc., as well as its relationship with local culture , history, geography and other aspects of relationship.

3. Literature and data research: You can learn about the history, evolution, genres, representative works and other aspects of folk music in southern Henan by reading relevant books, documents, music albums and other materials, and provide Provide a basis and reference for subsequent research and investigation.