What is han dynasty LiuRen type dish

Han dynasty appeared LiuRen type plate, it is a tool used to date and divination good or ill luck.LiuRen divination theory, from the five elements theory of Yin and Yang, a day dish and turf.The disc, called day dish;The square plate below, referred to as the territory."Nature round place".

Day trading is in the middle of the figure, the big dipper periphery have two ring, inner ring twelve Numbers, on behalf of December, outer ring is twenty-eight constellation.

Eight dry turf has three layers, the inner layer is four dimensions, eight Ding Bing south, east YiShen, namely the north decyl nonyl, western XinGeng;4 d is located at the four corners, northeast "e" ghost month, southeast "earth dou e", "ren", southwest northwest 豦 "day", also known as the four door: tianmen table, ground table into the door, a door watch, ghosts door to death.