System, transmigration, lying low. Wang Mang transmigrates into a fantasy world and acquires the Immortality System. The system's sole function is to add lifespan for him. Jog today: gain two days of lifespan. Punch today: gain three days of lifespan. Practice kicking today: gain five days of lifespan. A gentleman takes his revenge, and five hundred years is not too late. Five hundred years later, when Wang Mang finds his enemy again, the only thing he can do is breakdance on the enemy's grave. Question: What should you do after your enemy beats you up, and then the enemy dies? Answer: Marry his great-granddaughter. Sitting alone through the endless river of time, watching dynasties rise and fall, and seas turn into mulberry fields. Yet the only one who can accompany him is himself.