Eight Banners System
The Eight Banners system, established on the basis of the clan system, was an administrative and military system developed by Nurhaci. Nurhaci united the fragmented Jurchen people by grouping his subjects, civilians and soldiers, into eight banners. Initially, there were only four banners, which were named after their flag colors: yellow, red, blue, and white. Later on four banners were added with bordered banners as their symbols. These flags all had red borders, except the bordered red banner, which had a white border.