Chen's Hidden Book in Ming Dynasty: The lake is in the north of Xinghua, and there are ancient tombs in the lake. Locals occasionally get a sword. If they bend, they will agree with each other. If they let go, they will be as straight as before. As soon as they came out, they clanked their bones and their blades cut iron. In the golden jubilee, the army will win a great victory, saying, "This ancient man is soft in his fingers."
Hundred steelmaking is also a sword name.