What is "mianfu"

Mianfu (Hanzi:冕服, pinyin: miǎnfú) is a kind of Hanfu worn by emperors, princes and kings during imperial China, from the Shang Dynasty until Ming Dynasty.

Mianfu is the highest level of formal dress worn by emperors and royal family in special ceremonial events such as coronation, morning audience, ancestral rites, worship, new year's audience and other ceremonial activities.