"Yan guo (qian 11 shi ji-qian 222) -gu cheng yi zhi (kao gu)" . . "China" . . "Excavations (Archaeology) China 河北省." . . "To 221 B.C." . . . . "Excavations (Archaeology) China Yi Xian (Hebei Sheng)" . . "Hebei Sheng (China)" . . "Yi Xian (Hebei Sheng, China)" . . "易县 (Hebei Sheng, China)" . . . . . "燕下都" . . "Lower capital of the Yan state" . . . . . . . . . . "Yan xiadu" . . . "History" . . . . . "Yan Xia du" .