Yansheng Coins, commonly known as Chinese numismatic charms, refer to a collection of special decorative coins that are mainly used for rituals such as fortune telling, Chinese superstitions, and Feng shui. They originated during the Western Han dynasty as a variant of the contemporary Ban Liang and Wu Zhu cash coins. Over the centuries they evolved into their own commodity, with many different shapes and sizes. Their use was revitalized during the Republic of China era. Normally, these coins are privately funded and cast by a rich family for their own ceremonies, although a few types of coins have been cast by various governments or religious orders over the centuries. Chinese numismatic charms typically contain hidden symbolism and visual puns. Unlike cash coins which usually only contain two or four Hanzi characters on one side, Chinese numismatic charms often contain more characters and sometimes pictures on the same side.

The Ban Liang was the first unified currency of the Chinese empire, first minted as early as 378 BCE and introduced by the first emperor Qin Shi Huang as China's first unified currency around 210 BC. It was round with a square hole in the middle. Before that date, a variety of coins were used in China, usually in the form of blades or other implements, though round coins with square holes were used by the State of Zhou before it was extinguished by Qin in 249 BCE.