This picture depicts the costume and headdress of Li Jiancheng from the TV series "Glory of Tang Dynasty".
Li Jiancheng was the eldest son of Li Yuan, the founding emperor of the Tang Dynasty, and also the half-brother of Emperor Taizong of Tang.
He was a man with great ambitions and had attempted to seize the throne through several coups.
In the series, he is shown wearing a magnificent dragon robe, a golden crown, and holding a sword, exuding an air of majesty.
His costume and headdress are typical of the Tang Dynasty style, showcasing the prosperity and splendor of the Tang era.