Barbarian in Douluo

This is a story of a modern person transmigrating to the protagonist. Tang Sangang looked at the poor commoners and the nobles at the top, with a sickle in his left hand and a hammer in his right, vowing to overthrow the three mountains.
Why is the protagonist named Tang Sangang:
A bar of sentient beings, changed the world,
Two bars of the earth, turned into a planet,
Three bars of heaven, get rid of the dross,

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