Lord of profound heaven, major Daoist deity / aka Black Tortoise 玄武 / or Black heavenly emperor 玄天上帝
四象
sì xiàng
four divisions (of the twenty-eight constellations 二十八宿[er4 shi2 ba1 xiu4] of the sky into groups of seven mansions), namely: Azure Dragon 青龍|青龙[Qing1 long2], White Tiger 白虎[Bai2 hu3], Vermilion Bird 朱雀[Zhu1 que4], Black Tortoise 玄武[Xuan2 wu3]
Prime tortoise of the record bureau, Song dynasty historical encyclopedia of political essays, autobiography, memorials and decrees, compiled 1005-1013 under Wang Qinruo 王欽若|王钦若 / and Yang Yi 楊億|杨亿, 1000 scrolls
北宋四大部书
Běi Sòng sì dà bù shū
Four great compilations of Northern Song dynasty, namely: Extensive records of the Taiping era (978) 太平廣記|太平广记, Imperial readings of the Taiping era 太平御覽|太平御览, Prime tortoise of the record bureau 冊府元龜|册府元龟, Finest blossoms in the garden of literature 文苑英華|文苑英华
Four great compilations of Northern Song dynasty, namely: Extensive records of the Taiping era (978) 太平廣記|太平广记, Imperial readings of the Taiping era 太平御覽|太平御览, Prime tortoise of the record bureau 冊府元龜|册府元龟, Finest blossoms in the garden of literature 文苑英華|文苑英华
玄武
Xuán wǔ
Black Tortoise (the seven mansions of the north sky) / (in Daoism) God of the north sky