These astrolabes consist of a lacquered, two-sided board with astronomical sightlines. Along with divination for Da Liu Ren, the boards were commonly used to chart the motion of Taiyi through the nine palaces. The markings are virtually unchanged from the shi to the first magnetic compasses.
Astrolabes typically feature a lacquered, two-sided board with astronomical lines. They were also used for divination purposes, specifically Da Liu Ren, and to chart Taiyi's path through nine palaces. The markings on these devices have remained relatively consistent from ancient times to the early magnetic compasses.