Coronation clothes (including crowns and corresponding costumes) are the most basic dresses of the Qin emperors, and they should be worn on various formal occasions. In the Han Dynasty, because Liu Bang created a kind of "Liu's Crown" made of bamboo skin, this kind of "Liu's Crown" was lighter, softer and more comfortable to wear, so Liu Bang often wore it to summon ministers, but it was only worn on more important occasions. The coronation ceremony gradually evolved into the highest-level dress. In the Ming Dynasty, Zhu Yuanzhang even stipulated that only when offering sacrifices to heaven and earth and ancestral halls, or even to the country, can you wear coronation clothes. In the Tang dynasty, the standard of coronation was not so high, but it could only be seen on some grand occasions, such as sacrificial ceremonies, important court meetings, and summoning foreign envoys. Generally speaking, emperors wear uniforms, and crowns are also lighter, softer and more comfortable cloth crowns or leather crowns. Tang Chengtu De is still yellow, and Li Yuan's clothing color is red, which should be to highlight his transformation from Tang Guogong to Tang Dynasty.