When he woke up, Yang Chen, a graduate student in the history department, found that he had become the fifth son of Emperor Wen of Sui Dynasty Yang Jian, a transparent prince who should have died early in history. The battle for the right to inherit the throne has become fierce. Prince Yang Yong is kind but has fallen out of favor, while King Yang Guang of Jin is ambitious. Faced with the desperate situation of a wolf in front of him and a tiger in the back, Yang Chen's only reliance was a golden finger in his mind called [Great Sui Emperor Simulator]. He can consume 'National Fortune Points' to simulate the future direction of any decision. 'Simulating the canonization of the crown prince and grand master', 'simulating support for Jin Wang Yang Guang', 'simulating asking for a vassalship'... Simulating again and again, peeking into the future again and again, Yang Chen danced on the tip of the knife, step by step, from a prince who no one cared about to the supreme Ninth Five-Year Plan. The country is picturesque, I am here to write!