Yōuzhōu Jiédùshǐ (幽州), also known as Yōujì Jiédùshǐ (幽薊), Yānjì Jiédùshǐ (燕薊), Fànyáng Jiédùshǐ (范陽), and Lúlóng Jiédùshǐ (盧龍), was a military district during the Tang dynasty. It covered the area of Yānjì (燕薊) in what is now the Beijing and Hebei region. Youzhou was the base of operations for An Lushan as well as one of the revolting three garrisons of Hebei.