PS: I don’t know how to keep reviewing in the last chapter.

In fact, there are many mines in our mainland, but the grade is low. In addition, it is difficult to mine. There are no open-pit mines with low cost.

Many people don't understand why we buy iron ore for smelting, then sell crude steel, and then buy special steel.

The first is to maintain steel production, which can be used by the entire industrial system in times of war or other emergencies.

take it easy

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