人們在云南省大理州沙溪鎮北龍村先鋒沙溪白族書局看書（4月20日攝）。沙溪鎮位于云南省大理州劍川縣。自唐宋起，沙溪鎮便因豐饒的物產和平坦的地勢，成為茶馬古道上的貿易重鎮。馬幫馱著茶葉、鹽巴與絲綢，一路翻山越嶺，在此休整交易。[新華社記者 劉蓮芬 攝]

People visit a bookshop at Beilong Village of Shaxi Town, Jianchuan County, southwest China's Yunnan Province, April 20, 2025. A remote town in Jianchuan County, Shaxi was once an important trading hub for tea, herbs, silks and salt on the ancient Tea Horse Road, a trade route dating back to the Tang Dynasty (618-907). (Xinhua/Liu Lianfen)