The protagonist Li Ning travels through the Tang Dynasty with the system, helping Li Shimin develop people's livelihood, resist foreigners, and even unify the world.
The sun and the moon shine on the king's land. Li Ning used the system to work hard to strengthen himself and developed in a low profile for several years. He waited for Li Shimin's Xuanwu Sect incident before he came out to assist Li Shimin.
