Sun Mo and An Xinhui followed Lian Fangcao. After twisting and turning in a cave resembling a spider web, they finally arrived at a deep crater.
Under the illumination of the spirit diamond, a bronze-green colored mine appeared before Sun Mo.
"It's a copper mine!"
An Xinhui grabbed Sun Mo's hands tightly.
What was called 'gigolo money'?
This was it!
The Nine Provinces dealt in precious metals. However, gold and silver were very expensive and few in quantity too. It was not convenient to carry them. Hence, the most commonly used currency was still copper coins.
If one found a copper mine, it would mean that one found money.
However, if a copper mine was found in any location on the Nine Provinces, that would belong to the empire whose territory it was found in. It was forbidden for people to try and mine things. After all, the mine could be considered the emperor's money bag.