I was a prince in ancient times

...

It's that simple?

Chen Gui was dumbfounded, it was too simple, he thought it would depend on exquisite craftsmanship or complicated techniques.

The result is only the axle that can be understood at a glance.

Chen Gui, "..."

"It's so simple, why didn't anyone think of it before?" Chen Gui felt that those craftsmen who made carriages were too stupid.

Xie Anlan smiled, "That's because the difficulty lies in the unexpected."

Sometimes it's like this, no one can think of breaking the sky, and once it's broken, it's nothing more than that.

When Chen Gui thought about it, it was true, and he admired Xie Anlan even more in his heart.

This is gun|powder and the axle of the carriage. The lord has grown a heart with exquisite seven apertures, which was not used in the right place before.