Gan moye sword (干将莫邪剑), which is legendary in Chinese history, it is so moving, sad, miraculous, it may be true story, but probably is a myth.
Most likely a myth, although Gan Jiang might be a real person.
He is a pupil of Ou Ye Zi.
. Between them, the 10 legendary swords.
Zhanlu (湛卢)
Juque (巨阙)
Shengxie (胜邪)
Yuchang (鱼肠)
Chunjun (纯钧)
Longyuan (龙渊)
Tai’e (泰阿)
Gongbu (工布)
Ganjiang
Mo'ye
Allegedly, they were made for the King of Chu, Wu and Yue (Goujian).
That's why Sword of Goujian is a major national treasure. Its discovery and existence would be like discovering the sword Excalibur in the West for real. Although some still argue about its validity, Sword of Goujian (certainly made by a truly master craftsman, no matter what) points to that the legendary swords may at least, have a historical basis.
Of special note is the sword Tai'e or in Japanese, Taia. Legend has it, the King of Chu, faced with insurmountable odds, waved this sword to signal a counterattack and won. When asked about how he did it, he answered, the "spirit of the sword (metal?) combined with the spirit of a great king can cause miracles" (or was it "turn the will of Heaven".)
The name of the sword also means "Tai Mountain" like as in "the tallest mountain" or figuratively speaking "No Equal under Heaven". Because of that story, Taia is said to be magical. Legend has it, Shih Huang Di would gain possession of the sword and was buried with him, "ruling all under Heaven by a single sword".
Japanese monk Takuen Soho made the sword Taia the metaphor of Bushido in his "Annals of the Sword Taia" (the Taia-Ki), a chapter in the "The Unfettered Mind". One can say this book is the bible of Bushido.
Many legends are also associated with the Zhanlu sword, including being used by Yue Fei of the Sung Dynasty.
Yu Chang and Sheng Ye are said be buried with king Helu of Wu, he being the archrival and slain by Goujian of Yue.
Historical rediscovery of these swords would be priceless.
Ou Ye Zi, Ganjiang and Mo'Ye are likely to be Yue people, since the region and swordsmiths of Yue are legendary for their swords making during that time. Kingdom of Yue, which is south of Wu, refers to the region now known as Fujian province.
Also remember the swordsmanship of the so called legendary "Maiden of Yue", who is referred to in the Ballad of Hua Mu Lan as being her inspiration. Legend has it, King Goujian summoned her after hearing of her reputation and asked her to train his army. Story suggests that during this period, women fought alongside with men, and that swordsmanship training is already a detailed discipline.