Chinese burial money (traditional Chinese: 瘞錢; simplified Chinese: 瘗钱; pinyin: yì qián) a.k.a. dark coins (traditional Chinese: 冥錢; simplified Chinese: 冥钱; pinyin: míng qián) are Chinese imitations of currency that are placed in the grave of a person that is to be buried. The practice dates to the Shang dynasty when cowrie shells were used, in the belief that the money would be used in the afterlife as a bribe to Yan Wang (also known as Yama) for a more favourable spiritual destination. The practice changed to replica currency to deter grave robbers, and these coins and other imitation currencies were referred to as clay money (泥錢) or earthenware money (陶土幣).