《晋书·志·第十五章》
五牛旗，是平定吴地以后制造的，用五牛来插旗，车上设置五牛，青色赤色在左，黄色在中间，白色黑色在右。
五牛旗，平吴后所造，以五牛建旗，车设五牛，青赤在左，黄在中，白黑在右。
After the pacification of Wu, the "five-oxen banner" was devised, using five oxen to display the banners, and was mounted on a carriage decorated with five oxen, with blue and red on the left, yellow in the middle, and white and black on the right.