C2272 Do You Know What This Means?

Zhong Wen's guess was not wrong.

The Thule seemed to be a world of ice and snow. It was cold and desolate, and there was no one there. However, it actually had the largest iron mine in the Firstborn Realms. The reserves of gold, silver, copper, lead, zinc, chromium, nickel, and other colored metals were extremely rich.

Furthermore, the environment was harsh and difficult to mine