Jade burial suits

A jade burial suit (Chinese: 玉衣; pinyin: yù yī; literally: "jade suit") is a ceremonial suit made of pieces of jade in which royal members in Han dynasty China were buried.

Of the jade suits that have been found, the pieces of jade are mostly square or rectangular in shape, though triangular, trapezoid and rhomboid plaques have also been found. Plaques are often joined by means of wire, threaded through small holes drilled near the corners of each piece. The composition of the wire varies, and several suits have been found joined with either gold or silver. Other suits, such as that of King Zhao Mo, were joined using silk thread, or silk ribbon that overlapped the edges of the plaques. In some instances, additional pieces of jade have been found beneath the head covering, including shaped plaques to cover the eyes, and plugs to fit the ears and nose.

According to the Book of Later Han, the type of wire used was dependent on the status of the person buried. The jade burial suits of emperors used gold thread; princes, princesses, dukes, and marquises, silver thread; sons or daughters of those given silver thread, copper thread; and lesser aristocrats, silk thread, with all others being forbidden to be buried in jade burial suits. Examination of the known suits, such as the two found in Mancheng, has revealed that these rules were not always followed. Considering the vast size of the country, and the relatively slow means of disseminating information, it is not surprising that the materials and techniques used in a jade burial suit occasionally differed from the official guidelines.

A jade burial suit was extremely expensive to create, and only wealthy aristocrats could afford to be buried in them. Additionally, the process of manufacturing a suit was labor-intensive and is estimated to have required several years to complete a single suit.

Tombs from the Spring and Autumn period belonging to the dukes of the Jin state in Quwo were discovered in which the body was covered with small jade pieces once interwoven with silk.

...
Wikipedia