From the Start, I Was the Tang Dynasty's State Preceptor, Saving the Tang Emperor in the Underworld

He once read Li Shimin's fate, declaring, "Bring peace to the world and comfort the people." In the ninth year of Wude, he advised Li Shimin to stage a coup and seize power, after which Li Shimin appointed him Imperial Preceptor of the Tang Dynasty.

But all of this was done by Ning Xianzhi for the sake of a monkey.