Complex sentence: The dynastic founder of the Tang dynasty, Li Yuan, was from Taiyuan, began his conquest of China with Taiyuan as a base, and relied heavily on the support of its local aristocracy.
Split into simpler sentences: The dynastic founder of the Tang dynasty, Li Yuan, was from Taiyuan. Li began his conquest of China with Taiyuan as a base, and relied heavily on the support of its local aristocracy.