The Great Tang Crown Prince

He transmigrates into Li Xian, the third son of Emperor Gaozong of Tang, Li Zhi, and Wu Zetian, as well as the crown prince.

With a sign-in System, but with the System only allowing one task a month, he can only rely on himself to steadily build his strength while counting on the System to help him change his fate and transform the entire Tang dynasty.

As he grows stronger with each passing day, threats from all sides mount. Relying on the power he has built and the System, Li Xian repeatedly turns danger into safety and crises into opportunities.

He takes on the martial world, battles foreign powers, and defies the Mandate of Heaven, ultimately ascending to the pinnacle of power.

He shakes every nation, makes all kingdoms bow in submission, and becomes a legend for the ages.