Reincarnated as the Prince Consort, Who Marries the Princess?

Modern sales champion Su Yan transmigrates into the decadent son of a Grand Marquis, facing a conspiracy that nearly gets him beheaded by the Eldest Princess. Desperate to save his life, he leverages modern business acumen to partner with his fiancée, the Princess. Together, they launch innovative ventures like bubble tea, soap, and alcohol, amassing immense wealth. Su Yan decisively defeats his enemies, rises to the position of Grand Marquis, and ultimately shares a lasting bond with the Princess.