This AI video decodes the secrets of the Sword of Goujian, a national treasure, taking viewers back to a magnificent past more than 2,500 years old. The bronze sword belonged to Goujian, king of the Yue state during the Spring and Autumn Period (770–476 BC). It was unearthed in Jingzhou, Hubei Province in 1965 and is now housed at the Hubei Provincial Museum in Wuhan. The sword is renowned for its exceptional sharpness and remarkable resistance to corrosion, representing the pinnacle of bronze craftsmanship of that era. (Produced by Cheng Weidan, Zhu Yingqi, Liang Peiyu, Xie Runjia, Di Jingyuan, Chu Chu and Wu Jun. Interns Ding Man and Wang Zhuoqian also contributed to the story.)