108 Inventions (Second Update)_3

After his surprise, he said, "The thing you mentioned, I've seen it. Only the royal foundry has it."

No local craftsman knows how to make a water hammer.

"I can make one," Gu Jiao said.

The old blacksmith was greatly surprised.

Gu Jiao contemplated, "But, what I'm going to make next is not a water hammer."

Gu Jiao mentioned a name.

"What kind of box?" The old blacksmith said he'd never heard of it!

"Do you have paper?" Gu Jiao asked.

"What?" The old blacksmith had been stunned by Gu Jiao, taking a long while to respond.

Gu Jiao simply found a piece of bluestone on the ground, took out a charcoal pencil from her pouch, and began to draw meticulously.

Other blacksmiths were drawn in, but the old blacksmith shouted, "What are you looking at! Get back to work!"

Out of respect for the master, the blacksmiths suppressed their curiosity and went back to work though their eyes kept darting towards Gu Jiao.

What on earth was this young girl drawing on the ground of their foundry?