a type of hard, dark volcanic rock composed mainly of plagioclase and pyroxene, often used as a building material

Xuanwu district of [[南京|南京|nan2 jing1]] in [[江苏|江蘇|jiang1 su1]] province

A famous scenic lake located northeast of Nanjing, Jiangsu province; known as a former naval training ground during the Three Kingdoms period and as a historical resort since the Jin dynasty.

the Dark Warrior, a major Taoist deity also known as the Perfect Warrior or the Northern Emperor

basalt; a dark volcanic rock

The palace coup of June 626 during which [[李世民|李世民|li3 shi4 min2]] killed his brothers and seized the throne from his father to become Emperor Taizong of the Tang Dynasty.