This is steamed bread, also called Tang towel.
Wotou is made by changing the head of the scarf and bag. Founded in the late period of Emperor Wu of Zhou Dynasty, the three-foot soap silk (soap is black) was left behind in the late period of Zhou Dynasty, so it was called Wotou. In Tang Kaiyuan, Luo was used as the system, and in the middle and late Tang Dynasty, it was wrapped in lacquer yarn. It is still a gimmick. Its form is divided into dome and square top, which can be divided into soft wrap and hard wrap. At first, the soft wrap towel was worn by nobles and nobles, and then it was gradually loved by officials and literati, and it became more popular in the Tang and Five Dynasties. At that time, it was called "dressing up"