In ancient times, the day was divided into north and south, east and west four ancient Palace respectively to Tsing Lung (black dragon), the white tiger, rosefinch, black (a turtle of God) name.

• 在上古时代，古人把天分为东西南北四宫，分别以青龙(苍龙)、白虎、朱雀、玄武(一种龟形之神)为名。