The Sword of Goujian (Chinese: 越王勾践剑; pinyin: Yuèwáng Gōujiàn jiàn)[1] is a tin bronze sword, renowned for its unusual sharpness, intricate design and resistance to tarnish rarely seen in artifacts of similar age. The sword is generally attributed to Goujian, one of the last kings of Yue during the Spring and Autumn period.