Chinese Jade Cong: Earth Symbol & Ritual Object

The Square Within the Circle: Earth's Sacred Form

The jade cong — a tube with a square outer cross-section and a circular inner channel, one of the most distinctive and most philosophically profound objects in the entire history of Chinese art — is the material embodiment of one of the most fundamental principles of the ancient Chinese cosmological tradition: the relationship between heaven and earth, between the circular form of the sky and the square form of the earth, between the cosmic order above and the human world below. The cong's unique form, in which a circular channel passes through a square outer body, represents in physical form the ancient Chinese understanding of the cosmos as a system in which the circular heaven encompasses and penetrates the square earth, and in which the human world is the meeting point of these two cosmic principles.

Like the jade bi disc, the cong is one of the six ritual jades described in the ancient Chinese ritual text Zhouli (Rites of Zhou), where it is identified as the ritual object used to worship earth. This identification of the cong as the instrument of earth worship reflects the ancient Chinese understanding of the square form as the symbol of earth — the earth, in the ancient Chinese cosmological tradition, was understood as a flat, square surface beneath the circular dome of heaven — and of jade as the material most appropriate for communication with the cosmic forces of the natural world. The cong thus embodies in its form and its material the two most fundamental principles of the ancient Chinese cosmological tradition as they apply to the earth: the square form of the terrestrial world and the cosmic power of jade.

Liangzhu Cong: The Pinnacle of Neolithic Jade Art

The jade cong tradition has its origins in the Neolithic Liangzhu culture of the Yangtze River delta, where the earliest and most technically accomplished cong were produced between approximately 3300 and 2300 BCE. The Liangzhu cong are among the most extraordinary objects produced by any Neolithic culture in the world, combining extraordinary technical accomplishment with a formal complexity and a decorative richness that reflect the sophisticated cosmological framework of the Liangzhu culture. The finest Liangzhu cong, such as the great cong in the collection of the Zhejiang Provincial Museum, are objects of breathtaking beauty and technical mastery, with walls of extraordinary thinness, surfaces of remarkable smoothness, and carved decoration of extraordinary delicacy and precision.

The decoration of Liangzhu cong typically features the taotie face — a stylized face with large eyes, a broad nose, and no lower jaw that appears repeatedly in the decorative programs of Liangzhu jade objects and that is understood as a representation of a divine or ancestral being of great cosmic power. The taotie face on the Liangzhu cong is carved at the corners of the square outer body, where the transition between the square and the circular forms of the cong creates a natural focal point for decoration, and the repetition of the taotie face around the cong creates a sense of cosmic completeness and divine presence that reflects the Liangzhu culture's understanding of the cong as an instrument of communication with the divine powers of the earth.

The Cosmic Geometry of the Cong

The geometric form of the jade cong — the square outer body and the circular inner channel — is one of the most philosophically rich forms in the entire history of Chinese art, encoding in its geometry the most fundamental principles of the ancient Chinese cosmological tradition. The square outer body represents the earth, the terrestrial world, the realm of the human community and the natural world. The circular inner channel represents heaven, the sky, the cosmic order that governs the universe. The jade material of the cong, flowing between the square and the circular forms, represents the cosmic power that connects heaven and earth and that makes the human world a part of the divine order.

The relationship between the square and the circle in the cong's form was understood in the ancient Chinese tradition as a representation of the fundamental cosmic relationship between earth and heaven, between the human world and the divine order. The square encompasses the circle, just as the earth encompasses the axis of heaven that passes through it; the circle penetrates the square, just as the cosmic forces of heaven penetrate and animate the terrestrial world. The cong thus represents in physical form the ancient Chinese understanding of the cosmos as a system of mutual penetration and mutual dependence between heaven and earth, in which neither can exist without the other and in which the human world is the meeting point of both.

Ritual Uses: Worshipping Earth

The primary ritual use of the jade cong in ancient China was in the great state ceremonies of earth worship that complemented the heaven worship ceremonies in which the jade bi disc was used. The Zhouli describes the use of a yellow cong in the ceremony of worshipping earth, in which the emperor offered the cong to the divine powers of the earth as a symbol of his submission to the cosmic order and his commitment to governing the human world in accordance with the principles of both heaven and earth. The yellow color of the cong used in earth worship reflected the association of the earth with the color yellow in the ancient Chinese cosmological tradition, and the jade material of the cong reflected the understanding of jade as the material most appropriate for communication with the cosmic forces of the natural world.

Beyond its use in the great state ceremonies of earth worship, the jade cong was used in a wide range of other ritual contexts in ancient China, including burial rituals, shamanic practices, and personal devotional activities. In burial rituals, cong were placed in the tombs of the Liangzhu elite and later of the Chinese aristocracy as instruments of cosmic protection and as symbols of the deceased's connection with the divine powers of the earth. In shamanic practices, the cong was understood as an instrument through which the shaman could communicate with the spirits of the earth and the ancestors, using the cong's cosmic geometry to create a channel of communication between the human world and the divine realm.

The Cong in Later Chinese Culture

The jade cong tradition continued through the Shang and Zhou dynasties, though the form and decoration of the cong evolved significantly from the Neolithic prototypes. Shang dynasty cong are generally shorter and more squat than Liangzhu cong, and their decoration reflects the Shang dynasty's distinctive aesthetic sensibility, with the taotie face rendered in the bold, angular style characteristic of Shang bronze decoration. Zhou dynasty cong show further evolution in form and decoration, with the development of new decorative motifs and new approaches to the relationship between the square and circular elements of the cong's form.

By the Han dynasty, the jade cong had largely ceased to be produced as a ritual object in its original form, though the cong's cosmic symbolism continued to be referenced in Chinese art and literature. The cong's form was adapted and transformed in the decorative arts of later dynasties, appearing as a decorative motif in ceramics, bronzes, and other media, and the cong's cosmic symbolism continued to be understood and appreciated by Chinese scholars and connoisseurs who studied the ancient ritual texts and the archaeological remains of the Neolithic and Bronze Age cultures that had produced the original cong. The jade cong, the square within the circle, remains one of the most profound and most beautiful expressions of the ancient Chinese cosmological tradition, and its influence on Chinese art and thought continues to be felt to the present day.

Modern Appreciation and Healing Significance

In the modern world, the jade cong is appreciated both as an extraordinary object of ancient art and as a symbol of the profound cosmological wisdom of the ancient Chinese tradition. The finest Liangzhu cong are among the most sought-after objects in the market for ancient Chinese art, commanding prices that reflect both their extraordinary technical accomplishment and their profound cultural significance. The cong's cosmic symbolism — the square of earth within the circle of heaven, the human world as the meeting point of the cosmic forces above and below — continues to resonate in the modern world as a reminder of the ancient Chinese tradition's understanding of the human place within the cosmic order, and it offers a model of the relationship between the human world and the natural world that is as relevant and as challenging today as it was when the first Liangzhu jade workers shaped the first cong from the nephrite of the ancient Chinese rivers five thousand years ago.