Clothing is closely related to politics, especially before the feudal society, which is very prominent. The most typical example is the clothes of different ranks of officials, civil servants and military attaché s, which are strictly distinguished in style and pattern, and are used to directly divide and indicate identity and rank. Emperors often show dragons in formal clothes, civil servants show auspicious birds, and officers show wild animals. For another example, the Qin dynasty advocated black, so the clothing was mainly black.