Reviving the Tang Dynasty for Li Er

Su Yanzhi's family possesses an ancient jade pendant passed down through generations, its origin unknown—it was actually a personal item bestowed by Emperor Taizong of Tang, Li Shimin, to his crown prince Li Chengqian. One night, Li Chengqian, holding the pendant in contemplation, accidentally traverses a thousand years and suddenly arrives at the home of modern youth Su Yanzhi. Time and space misaligned, ancient and modern meet. Su Yanzhi discovers that the jade pendant is a medium connecting two worlds, capable of sending modern supplies, knowledge, and machinery to the Tang Dynasty. To help Li Chengqian secure his position as heir and assist Li Shimin in creating a prosperous era, Su Yanzhi uses the pendant to travel between past and present, aiding the Tang with wisdom and resources beyond its time: dismantling entrenched aristocratic clans, eliminating border threats, pacifying foreign invasions, rewriting the Tang's destiny, and forging an unprecedented legend of a powerful dynasty.