Books by Yan, Chongnian.
Qing gong shi da yi an zheng j
Qing gong shi da yi an zheng jie
Zhongguo gu du Beijing
Zhongguo gu du Beijing
Qing gong yi an zheng jie
Qing gong yi an zheng jie
Yan Chongnian zheng jie Qing g
Yan Chongnian zheng jie Qing gong yi an
Ming wang Qing xing liu shi nian
Yuan Chonghuan zhuan
Yuan Chonghuan zhuan
Qing chao huang di lie zhuan
Qing chao huang di lie zhuan
Man xue lun ji
Man xue lun ji
Yuan Chonghuan yan jiu lun ji
Yuan Chonghuan yan jiu lun ji (Wen shi zhe xue ji cheng)
Dianming han
Dianming han
Tianming Han (Qing di lie zhuan)
Yan bu ji
Yan bu ji
Nu'erhachi zhuan
Nu'erhachi zhuan
Qing chao di yi di : Nuerhachi
Qing chao di yi di : Nuerhachi