Yu Di (于頔) (died 818), courtesy name Yunyuan (允元), formally initially Duke Li of Yan (燕厲公) and later Duke Si of Yan (燕思公), was a general and official of the Chinese dynasty Tang Dynasty. He was a powerful warlord at the end of the reign of Emperor Dezong but submitted to imperial authority during the reign of Emperor Dezong's grandson Emperor Xianzong.
Read more about Yu Di: Background and Early Career, As Jiedushi of Shannan East Circuit, After Return To Chang'an