李渊
Feng Lun (568–627), courtesy name Deyi, better known as Feng Deyi, formally Duke Miao of Mi, was an official of the Sui and Tang dynasties who served as a chancellor during the reigns of Emperor Gaozu of Tang and Emperor Taizong of Tang. He was praised for his quick thinking but criticized by historians for his being overly attentive to the emperors' desires.