 The Liao dynasty ( Khitan : Mos <unk> ; simplified Chinese : <unk> ; traditional Chinese : <unk> ; pinyin : <unk> cháo ) , officially the Great Liao ( Chinese : <unk> ; pinyin : Dà <unk> ) , also known as the Khitan Empire ( Khitan : Mos <unk> @-@ d <unk> <unk> gur ; Chinese : <unk> ; pinyin : <unk> <unk> ) and the Liao Empire , was an empire in East Asia that ruled from 907 to 1125 over present @-@ day Mongolia and portions of the Russian Far East , northern Korea , and northern China . The Liao dynasty was founded by Abaoji , Khagan of the Khitan people around the time of the collapse of Tang China . It was the first state to control all of Manchuria . 
