Two hundred million taels.

It's almost a year's worth of tax revenue for the treasury of the Daqing Dynasty.

The equipment of the iron factory was all designed by Tang Fei, and then handed over to the technical director A Niu to manufacture.

These are easier said than done.

It took countless days and nights for everyone up and down the iron factory.

Tang Fei was even more busy, his feet did not touch the ground.

Design, use, operation ...... of the equipment

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