The Eternal Phase of the Great Qin Dynasty

As a white-collar worker in the 21st century, I finally managed to save a down payment, and when I was about to happily take out the house, I entered the door with my left foot first and fell to the ground. I time-traveled to Lu Buwei during the Warring States Period. As a historical scum, what should I do? Urgent! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.