一名參觀者在云南鐵路博物館拍攝SN型29號寸軌蒸汽機車（5月14日攝）。云南鐵路博物館位于昆明市北京路昆明北火車站內，是一座兼具“車站上的博物館”與“博物館中的車站”雙重屬性的專題展館。該館以百年云南鐵路發展史為主線，系統呈現了從米軌、寸軌到準軌，從蒸汽機車到高鐵的跨越式演進歷程。[新華社記者 陳欣波 攝]

A visitor takes photos of a steam locomotive at Yunnan Railway Museum in Kunming, southwest China's Yunnan Province, May 14, 2025. Housed in Kunming North Railway Station, the Yunnan Railway Museum takes the century-long development history of Yunnan railway as the leading story line to narrate the frog-leaping evolution railway gauge standards from meter gauge to inch gauge, and standard gauge, as well as railway technologies from steam locomotives to high-speed rails. (Xinhua/Chen Xinbo)