Building Infrastructure with My Lords

Qi Yi transmigrated into the body of a low-ranking retainer in a book set in a chaotic era. She had bright eyes, pearly teeth, and exquisite beauty. As ambitious warlords battled for the realm, famous strategists showed off their skills. She was just a useless hanger-on, living off others and waiting to die. In a few more chapters, she'd be beheaded. That wouldn't do! Was the air conditioner not cold enough, or was advanced mathematics too easy? After a while, Qi Yi realized that not only had she survived, she'd also managed to sell goods in both worlds. Remembering that her homework was due the day after tomorrow, Qi Yi took out her advanced mathematics workbook and furiously worked through ten pages. A renowned strategist and heir to the Guigu School stood behind her. "This is interesting, much more interesting than arranging troops. Let me see." Qi Yi looked at the linear algebra problems. "How about... we start with the multiplication table?" A few days later, the strategists followed her around every day. "Teacher, when will the new workbook arrive?" * The weather was hot, and the lord couldn't eat. Qi Yi presented him with ice cream and cooling patches... The lord praised her: "This is truly a divine delicacy. Reward her with a thousand gold coins." * The enemy army invaded. Qi Yi calmly took out a voice recorder and played the sound of thousands of horses charging. Without spending a single soldier, she successfully scared off the enemy. On the fifteenth of every month, a remarkable scene could be seen in the northern city. The rulers, normally consumed with hatred whenever they met, would line up obediently and share shopping tips. "That self-heating hot pot last month was incredible. You could enjoy a delicious meal without a fire." "Ever since I bought my mother a face mask, she's been much nicer to me." "I wonder what new products Mr. Qi Yi will bring out this month." "Why are they limited edition? What I bought wasn't nearly enough." The System told Qi Yi, "Your luck is terrible. You won't live past twenty. But you can extend your lifespan by winning over people with power. If you win over the ruler who unites the realm, you'll live a life free of illness and hardship." Qi Yi was stumped. "There are five or six rulers here. How am I supposed to know which one will unite the realm?" To be safe, Qi Yi decided to win over the rulers of every state. The volatile, brutal ruler of Chu in the west, the ruler of powerful Han in the east, the ruler of Yan in the south, who was controlled by treacherous ministers... As soon as any of them showed signs of uniting the realm, Qi Yi would flee and join the next ruler. Before she knew it, Qi Yi seemed to have won over every ruler. * In the fine spring rain of March, Qi Yi's faint smile looked to others like a flower glimpsed through the rain, hazy and indistinct. Qi Yi: "I meant to use my talents to help the rulers, but it seems they have their eyes on me instead." * The rulers belatedly realized that Qi Yi, who had repeatedly sworn she would serve no one else, had secretly befriended their enemies! Qi Yi was full of lies, but they still couldn't bring themselves to scold or hit her. Instead, they spent lavishly, hoping to win a single glance from her. Theme: Sweet romance