Prince or King of Yan (Chinese: 燕王; pinyin: Yān wáng; Wade–Giles: Yen 1-wang 2) was a Chinese feudal title referring to the ancient Chinese State of Yan and to its fiefs including the capital Yanjing (located within modern Beijing).. Typically, the title is translated as "King of Yan" for rulers prior to the establishment of the Chinese empire by Shi Huangdi and "Prince of …