The Yu Chan in barrow, it is the mouth that puts park body commonly in, be called again jade , or cicada. Yu Chan is contain by the meal evolve come over, the manners that 3 acting period can have the meal is contained after people is dead, should go to after the person is dead namely a few food are put in the mouth, among them a reason is the blood after the person is dead stops flow, facial begin inflexible, on a few food are put in past mouth the muscle of the facial ministry to let the dead is more a few fuller, also be a kind of esteem to the dead.
As the development of mortuary system, arrive after the Western Zhou Dynasty, especially period of age the Warring States, bury jade system develops quickly, jade article more and more was used to be in grave, use as bury jade, people thinks jade can open a mind, can make the person's corpse not corrupt, "Treasures is in 9 a key to do sth, the body is immortal " . Think in the ancients, cicada is not dead eternal life, every exuviate the skin is renascence. The house place of the incorporeal tabernacle that thinks the person's body is a person only, after the body is dead, like also hoping to be able to resemble cicada renascence, evolve into the appearance to engrave jade Cheng Chan gradually so.
Toward the consuetudinary Cong Chunqiu that cicada puts in the person's mouth the Warring States continues to period of the Tang Dynasty of the Sui Dynasty all the time, the as mortuary system change after Tang Zhi of the Sui Dynasty, what Yu Chan places in the mouth toward the dead is consuetudinary disappear gradually. The pattern of the yield that takes the place of toward each each is different, have the characteristic of its oneself, the Yu Chan that its have a characteristic most is Han Daiyu cicada, also represented the highest peak of the Yu Chan in grave.
