Starting with a Minimum Living Standard, My Uncle Is a Billionaire

A business emperor who was reborn after 20 years. In his previous life, he worked hard all his life and built a huge business empire, but he fell ill due to overwork and died young. On the hospital bed, his biggest regret was that he could not let his parents live a good life, and he was still brooding about the indifference of his uncle's family. After his rebirth, he has the business vision, technological knowledge and mind far beyond ordinary people for the next 20 years. He looks like a child on the outside, but is a hero on the inside. He is calm, sinister, and decisive in killing, but he has a deep admiration for his parents. All plots are fictional, please do not substitute reality!