The Mistake of the Vermilion Wall

A woman who transmigrates into a fictional dynasty becomes an abandoned consort in the Cold Palace and is forced into a symbiotic pact with a tyrant who died young in history: if he dies, she dies too. To survive, she has no choice but to use modern management techniques to reform the tyrant. But she gradually discovers that the "tyranny" recorded in the history books was really a smear campaign against reforms blocked by powerful clans. Together, they take on the aristocratic families and establish a new system of government.