Traveling to the Song Dynasty, a Weak Son-In-Law Counterattacked and Became the Richest Man

When I woke up, I found a master of finance graduate from a 985 university who had worked in an investment bank for five years and became the most miserable son-in-law in the Song Dynasty. He was groveling in front of others, but behind the scenes he used modern technology to quietly lay out his plans. Monopolizing the salt industry and manipulating grain prices, powerful officials in the DPRK and China scrambled to win over him, but little did they know that they were all pawns on his chessboard. But no one thought that this seemingly frail son-in-law still had an unsheathed sharp knife hidden in his arms...