The idiom "Dragon and Phoenix Chengxiang" comes from Han Kong's "Kong Cong Zi Ji Wen". The original text is: "The son of heaven, Bude, will lead to peace, then the dragon and the tortoise will lead to prosperity first." The word "auspicious" here refers to auspicious signs. Later, "Dragon and Phoenix" gradually evolved into an independent idiom, used to describe auspicious, festive occasions.