C293 Unenlightened cub

As if seeing through Jiang Huan's thoughts, Si Xi continued to explain.

"This Tongjiuzhou started out as a blacksmith, especially in the north of the Mount Yufeng, he has a piece of black iron ore! An entire black iron mine! Master! "Think about it, this is a gold mountain!"

Jiang Huan was also extremely shocked. The value of a private black iron mine could not be measured by gold and silver