The official hat is a kind of hat in ancient China, Korea, Dongning, Viet Nam and Ryukyu. It is a black-and-white hat, originally evolved from spreading feet and hoeing the ground. In the Song and Yuan Dynasties, the word "black hat" generally refers to the hat made of black gauze, that is, the black hat, which has not yet become the proper name of the official hat, but it is common in literary works after the Ming Dynasty, and even becomes an official hat, and has evolved into a synonym for official positions.

[1] The official wears black veil, and the official who loses it is called "losing the black veil". [2] Its internal shape is woven with iron wire, forming a hard shell, which bulges in Cobco. Lined with black gauze and painted with black paint. Its shape is mostly round, with folds in front, decorated with jade (to show its cleanliness).

The appearance of official hats in Ming dynasty is slightly similar to that in early Tang dynasty. The official black hat is coated with gauze, and its wings are flat, upward and round. It is made of iron and copper wire and then wrapped in black yarn. Dome, divided into upper and lower steps, with hat wings inserted on the left and right. Another name for an official hat often refers to an official position. In the series of official uniforms in the Ming Dynasty, their work was classified as official uniforms. Court officials, regardless of their civil and military tastes, are allowed to pass the service.

A formal dress with a black hat is often paired with an additional dress. In the third year of Hongwu (A.D. 1370), the Ming government made a rule: all officials should always take care of things and take their official positions and league leaders as official uniforms. It is also a public service to wear a belt outside the collar shirt. [3] At the same time, it is stipulated that all retired officials, as well as officials who serve their parents, are allowed to continue to wear official positions, while officials who have been removed from office because of things are dressed like the people and are not allowed to wear official positions.

[4] At the beginning of the Ming Dynasty, their official positions were not towering, but in the middle period, the atmosphere changed greatly. For example, Wang Chang, the minister in charge of the Ministry of War, said: "The gauze cap is the top, the boots are the bottom, and the high bar is used. People call it' Mr. Sangao'.