Ancient Chinese Currency: The Zhu and Wu Zhu Coinage

Illustrated Specimen Details: 50 Zhu (Daquan Wushi)

Example Specimen: 50 zhu (Daquan Wushi), 9-23 AD (Chinese Empire, Xin dynasty)

Authority & Heraldry: The coin features the stylized hieroglyphs 大 泉 五 十 (read right to left as "dà quán wǔ shí"). This inscription indicates the denomination's equivalence to fifty zhu, reflecting the ambitious standardizing reforms of the Xin dynasty's founder.

1. ANCIENT CHINA (2nd century BC – 7th century AD): zhu (also classified as cash coins)

The name of the zhu coin originated from an ancient Chinese unit of weight equal to approximately 0.56 grams. During the Xin dynasty and throughout the Han period, this weight unit became the basis for the entire monetary system. These coins are defined by their round shape with a signature square hole in the center, designed for stringing on ropes.

History and Evolution of Zhu Coinage

The zhu coin represents one of the longest-running monetary systems in history. Produced for nearly nine centuries, from the 2nd century BC until the establishment of the Tang Empire in the 7th century AD, it provided the structural foundation for trade across ancient China.

Zhu coinage is divided by numismatists into various experimental periods, most notably the era of Wang Mang (Xin dynasty) and the long-standing standardization of the Wu Zhu (Five Zhu) coins under the Han dynasty. Following the collapse of the Han, various iterations of these coins circulated until they were gradually supplanted by the qian.

The system was weight-based:

• 1 zhu ≈ 0.56 grams
  → larger denominations, such as the 50 zhu, were initially intended to correspond to these weight multiples.

The Wu Zhu (Five Zhu) Standard

The most significant representative of this series is the Wu Zhu coin (五铢). First issued in 118 BC, it replaced the chaotic currency systems of the earlier periods and became the standard for centuries. The Wu Zhu coin is renowned for its durability and consistency, having been mass-produced in billions of units. It provided the economic stability necessary for the Han Empire to flourish.

Wang Mang’s Reforms and the Xin Dynasty

The Xin dynasty period (9-23 AD) stands out as a time of radical monetary experimentation. Emperor Wang Mang attempted to replace traditional coins with a new series of denominations, including the 50 zhu coin, as part of a failed effort to centralize and standardize the economy. His reforms, which even included the temporary reintroduction of cowrie shells, resulted in economic disruption rather than order. After the fall of the Xin dynasty, the traditional 5 zhu coin was restored, though its weight and quality saw a gradual decline over the subsequent centuries.

Numismatic Perspective

From a numismatic perspective, collecting zhu coins offers a window into the evolution of Chinese administrative and economic policy:

• Han dynasty issues (standardized, high historical significance)

• Xin dynasty issues (rare, high interest due to their unique reformist designs)

• Late period issues (increasingly crude, reflecting the decline of the traditional casting techniques)

The zhu coin serves as a bridge between the ancient weight-based systems and the later, nominal cash coin era. Its endurance through centuries of political change remains a cornerstone study for any enthusiast of Asian numismatics.