It is what we usually call it, and it is a deep service system in the Chinese clothing system. Also called Fu. Refers to the big breasts of clothes. The lower part of the straight purlin is cut vertically, and the hem of the dress is at the side or behind the side. There is no sewing lace on the clothes, and it is fixed with a belt made of cloth or leather. After the Han dynasty, due to the improvement of underwear, the collaterals that prevailed in the pre-Qin and early Western Han dynasties seemed redundant. Based on the historical development principle that economy is better than beauty, after the Eastern Han Dynasty, direct tune gradually became popular and became the main mode of deep service.

It was used as a uniform in Qin and Han dynasties, but now it is mostly used for formal attire.

Plain yarn clothing:

It is a cultural relic excavated by China archaeologists in Mawangdui Han Tomb in Changsha on 1972. It is the peak work of textile technology in the Western Han Dynasty and a national first-class cultural relic.

The plain gauze gown unearthed from Mawangdui No.1 Han Tomb has a length of 1.28 cm and a sleeve length of 1.90 cm, and consists of a top and a bottom skirt. Cross neck, right hand, straight hand. The fabric is plain yarn, and the edge is geometric loop brocade. Plain yarn is very fine, the material is about 2.6 square meters, and the weight is only 49 grams, less than one or two. It is the lightest plain yarn garment in the world and the earliest printed fabric. It can be described as "as thin as cicada wings" and "as light as smoke", with bright colors and gorgeous patterns. It represents the highest level of sericulture, reeling and weaving technology in the early Western Han Dynasty.