Its first ruler, Gaozu, defeated the last Sui emperor.  
One emperor of this dynasty established the Intrepid Militia. Women began fashioning their hair into the "convict cinch" in sympathy for an exiled ruler from this dynasty living in Chengdu named Xizong. This dynasty was briefly interrupted by the self-proclaimed Second Zhou Dynasty. One ruler of this dynasty died when his wife, the future (*) Empress Wei, poisoned his pastry, although Wu would be succeeded by the long-ruling Emperor Xuanzong. Its first ruler, Gaozu, defeated the last Sui emperor.  Later, An Lushan rebelled against this dynasty. For 10 points, during which Chinese dynasty did poet Li Po live?
One emperor of this dynasty established the Intrepid Militia.
Tang Dynasty