Wikipedia
Diyi
Diyi is the historical Chinese attire worn by empresses and crown princesses (wife of crown prince) in the Ming Dynasty. It is a formal wear meant only for ceremonial purposes. It is a form of shenyi, and is embroidered with long-tail pheasants (翟, Di) and circular flowers . It is worn with phoenix crown (without the dangling string of pearls by the sides). Diyi has been worn by empresses and other royal noblewomen (differs according to different dynasties) since the Zhou Dynasty under various names like huiyi in Zhou and Song Dynasty, and miaofu in Han Dynasty.