Introduction to cultural relics: After a large number of cultural relic surveys, collection and sorting work, the relevant railway departments have collected and displayed a total of 9593 precious historical photos, cultural relics, documents, etc. Among them, 8 are national first-level cultural relics, 10 are second-level cultural relics, and 118 are third-level cultural relics that have been appraised by the Yunnan Provincial Cultural Relics Appraisal Committee.