Hong Fei refers to the flag painted with a swan goose. "On the Book of Rites": "If there is a car riding in front, it will carry Hong Fei." Ying Da Shu by Confucius: "Hong, Hong Yi also. Feifei has a parade, similar to riding a car. If he suddenly sees more than one car riding an army in front of him, he will draw a picture on the bow and hold it for everyone to see and take precautions. "