The body of Lady Dia (Xin Zhui) is considered to be the best-preserved mummy every discovered. Scientists were stunned how much her remains had been preserved as all her internal organs and blood vessels that were in tact with small amounts her own type-A blood found inside her veins. Her skin was soft and moist, with muscles that still allowed for her arms and legs to flex at the joints. Her body was so well preserved that they also believe the last thing she ate before her death was melon. When her tomb was discovered the body had been buried with her wardrobe of 100 silk garments, 160 carved wooden figures representing her servants as well as her make up and toiletries. The body itself was swaddled in more than 20 layers of silk and then sealed within four coffins packed with charcoal and sealed with clay, making it watertight so bacteria could not enter.
Xin Zhui's body and tomb are considered one of the most important achaeological discoveries of the 20th century. Besides having some of the best-preserved human remains ever discovered in China, the contents of Xin Zhui's tomb revealed an incredible amount of information about life in the Han dynasty that was previously unknown. The discovery continues to advance the fields of archaeology and science in the 21st century, particularly in the area of preservation of ancient human remains. Scientists in 2003 developed a "secret compound" that was injected into Xin Zhui's still existing blood vessels to assure her preservation. Research at the Hunan Provincial Museum continues in an effort to perfect corpse preservation, using Xin Zhui as the main candidate for such procedures.