After Signing for Thirty Years, I Saved Datang!

Traveling through the Sui harem, Li Zhan became a Qianniu Guard of the imperial army guarding the Yingwu Hall of the harem. Later, Li Zhan signed an agreement with the system not to leave the palace for thirty years and successfully activated the sign-in system. Sign in in front of Xiang Yu's portrait and get the Overlord's power as a reward; Sign in in front of Huo Qubing's portrait and receive the reward of eight hundred heroic souls of the great man; Sign in in front of the portrait of Bai Qi, the God of Death, and get the reward of Killing God Slash; Bored, Li Zhan accepted Li Shimin as his disciple, and secretly helped Li Shimin clear the way to become emperor! … Thirty years later, When the Turkic Wolf King Jieli led a tribe of millions of demon wolves to conquer the Tang Dynasty and use all the people of the Tang Dynasty as rations for the demon wolves, Li Zhan finally walked out of the palace... ……………… This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.