Needle knife? Fire needle?

As soon as the old man heard this, he was immediately confused.

He had never heard of what a needle knife or fire needle was.

"Needle knife is made of a kind of metal material, in the shape similar to a needle and a knife. It's a type of acupuncture tool."

Seeing that everyone was confused, Fang Qiu took out the two tools and showed them to everyone while explaining.

"The shapes and lengths of ...