Vault Protector coins (traditional Chinese: 鎮庫錢; simplified Chinese: 镇库钱; pinyin: zhèn kù qián) were a type of Chinese numismatic charm coins created by Chinese mints. These coins were significantly larger, heavier and thicker than regular cash coins and were well-made as they were designed to occupy a special place within the treasury of the mint.[1] The treasury had a spirit hall for offerings to the gods of the Chinese pantheon, and Vault Protector coins would be hung with red silk and tassels for the Chinese God of Wealth.[2] These coins were believed to have charm-like magical powers that would protect the vault while bringing wealth and fortune to the treasury.[3][4]
Vault protector coins were produced for over a thousand years in China, with roots in the Southern Tang dynasty (Five Dynasties and Ten Kingdoms period) and production continued into the Qing dynasty.