Chapter 859 This armor is your new cell!

The most intuitive manifestation of the development of technology and productivity is transportation.

More than a hundred years ago, before the Civil War, the black slave trade had declined, and pigs, which were more useful and more subjective than black slaves, became substitute products. The ships transporting Chinese laborers did not directly cross the Pacific Ocean. The ships at that time Speed, navigation, and supplies along the way are all problems. Crossing the vast ocean is an act of courting death, so this journey is very long, and it is based on months.

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