Tang Dynasty - Kaiyuan Tongbao Small Coin, Right-tilted Yuan Kaiyuan Tongbao was the main currency of the Tang Dynasty in the 7th century, not a year-engraved coin, inheriting the shape and size of the Qin half-tael and Han five-zhu coins, and evolving into a new decimal weight unit—qian and liang, replacing the previous twelve-unit zhu. In the history of the millennium, it represents a significant reform in the history of Chinese currency, transforming into a currency system based on the nominal value of coins, which influenced the subsequent formats of Chinese coins, the pattern of coin inscriptions, and the decimal measurement methods. This coin features a unique writing of the Yuan character on the right. Please take a good look at the photos, they are part of the description. They provide a clear picture of the quality and condition of the product and they fill in any gaps in the text or correct any errors and are decisive for the description of the product. ID: 3288