这是明代大文学家杨慎游历霁虹桥时写下的诗句。霁虹桥是“世界现存的唯一最古老的铁索桥”(李约瑟《中国科技史》),位于云南省永平县杉阳乡与保山市水寨乡之间的澜沧江上,它是我国古代内地通往西方和东南亚各国的交通咽喉。早在西汉以前,这里就成为古西南丝路——“蜀身毒道”之要 This is the poem written by Yang Shen, the great writer of the Ming Dynasty, who traveled to Hongqiao. Hongqiao is the only surviving cable bridge in the world (Needham History of Science and Technology in China). It is located on the Lancang River between Shanyang Township, Yongping County, Shuihai Township, Yongping County, Yunnan Province, Traffic to the West and Southeast Asian countries throat. As early as before the Western Han Dynasty, here became the ancient Southwest Silk Road - “Shu body poison Road ”