 Starting from Tang Dynasty, the official robes were divided into colors, depending on both position and grade.“Officials with high positions and low grades are still dressed according to the original products.” The six kinds of coronal clothing were abolished after Qin Shihuang unified the whole country, except for the black Xuanmian that would serve for sacrificial purposes.During the Qin dynasty everyone, from emperor to civilians, wore black for one very specific and unique reason.