Zhuoyun YuBooksPalaces of the Forbidden City紫禁城宮殿Palaces of the Forbidden CityGong dian jian zhuPalaces of the Forbidden CityZhongguo Zi jin cheng xue hui lun wen jiZi jin cheng gong dianGu gong jian zhu tu dianZhongguo gong dian jian zhu lun wen jiAuthor data: Open Library