The Sword of Goujian: Ancient Enigmas and Millennial Rustproof Tech

The Sword of Goujian, a 2,500-year-old bronze artifact belonging to the King of Yue, was discovered in 1965 in a Chu tomb and remains legendarily sharp, capable of slicing through 23 layers of paper in modern tests. Its extraordinary preservation is attributed to a unique lead-free alloy and the airtight, water-sealed environment of the tomb, which protected the blade from corrosion over the millennia. The weapon showcases advanced ancient technology, featuring eleven concentric circles on the hilt spaced only 0.2mm apart and microscopic dendritic crystals—a structure comparable to modern semiconductor manufacturing.