The Invincible Salesman Signs for the World-Destroying Demon Concubine at the Beginning

"This product... The price needs to be increased." This is what Li Hei says most. Everyone in the world scolded him as the most evil-hearted salesman. He would pluck out the hair of a wild goose, and even the devil would be skinned by him. But every single item he sent accurately moved the structure of the Ten Thousand Clans. A steelyard measures goods and weighs lives. A trade road delivers things and paved way for human race to survive. The moment the seal of the World-Destroying Demon Concubine was released in his hands—— Only then did Wanzu realize that this black-hearted salesman had no intention of just doing business from the beginning.