Transmigrate into a Book to Fight for My Life

In the twenty-second year of Tianyuan, Emperor Jing had no sons, leaving the position of Crown Prince vacant. He therefore issued an imperial decree summoning young men from the collateral branches of the Qi imperial clan to the capital. Those of outstanding character and talent would have a chance to be named Crown Prince. The young men of the Qi clan's collateral branches did everything they could to win the emperor's favor. Gu Shanshan transmigrated into a novel overflowing with overpowered male-lead energy, only to somehow become a cannon-fodder villainess who looked down on and bullied the male lead. She was also frail and sickly, fated not to live past twenty-five! To stay alive, she decided to cling tightly to the male lead. As it turned out, she clung a little too tightly. In the first year of Qiming, the new emperor was cruel and unpredictable. The prime minister read the situation and acted decisively, marrying off his adopted daughter. Gu Wan: ??? No way, Father! I want to try to fight this a little longer! Years later, the retired prime minister said, "The best decision I ever made was marrying my daughter to the right husband." A heroine with a busy inner monologue who thinks she's low-key x a moody, enigmatic male lead who keeps his cards close to his chest I'm typing with my face on the keyboard, please add this to your collection~ Note: This is a one-on-one romance with a happy ending. The male lead's golden finger is incredibly powerful. He's only weak early on because he's keeping a low profile and biding his time. Any hardship that causes no real harm is just a stepping stone. Just for fun, so please don't nitpick the details.