An underground “Great Wall” – not built of brick and stone, but of timber and rock, layer upon layer beneath the earth, constructed three thousand years ago.

The Ruichang Tongling Shang-Zhou mining site is located on Tongling Mountain in Xiafan Township, Ruichang City, about 10 kilometers from the city center [1, 2]. This land has a long history of human activity. As early as 783 AD (the fourth year of the Jianzhong era of the Tang Dynasty), the “Chiwu Field” was established here, named after a legend of a red crow appearing as an auspicious omen during General Cheng Pu’s military encampment in the Three Kingdoms period [1, 2]. But the secrets that would truly rewrite history lay buried underground, only to be rediscovered by modern civilization in the 20th century.

A Discovery Spanning Three Millennia

In 1959, the Nanchang Iron and Steel Plant established a mining area at Tongling in Xiafan Commune, beginning large-scale extraction of iron ore and dolomite [1, 3]. Over the following decades of mining, traces of ancient tunnels gradually emerged. In 1980, workers unearthed a rare collection of animal fossils – saber-toothed elephant tusks, dinosaur bones, and antelope remains – identified by the Chinese Academy of Social Sciences as dating to the Late Pleistocene epoch of the Quaternary period [1, 4].

The real archaeological breakthrough came between 1983 and 1984. During a county-wide cultural relic survey, archaeologists formally identified this grand ancient copper mining site [1, 5, 6]. Research confirmed that mining and smelting at Tongling began in the middle Shang Dynasty, developed steadily through the Western Zhou, and reached its peak during the Spring and Autumn and Warring States periods, spanning over 1,000 years of continuous operation [1, 7].

The Underground Labyrinth: Shang-Zhou “Black Technology”

The mining and smelting area covers approximately 2 square kilometers, with a core mining zone of 0.5 square kilometers [7]. Within a mere 300 square meters of excavated area, 24 vertical shafts, 2 levels, and 3 inclined shafts were revealed [1, 6]. Comprehensive survey data is even more impressive: the entire site contains 103 vertical shafts, 19 levels, 8 “horse-head gates” (shaft bottom station structures), and 2 open-pit trenches [7].

Behind these numbers lies a precision-engineered underground maze.

The structural wisdom of Shang-Zhou craftsmen is astonishing. The support systems of shafts and levels constitute the most scientifically valuable aspect of the site. Shang Dynasty supports primarily used “bowl-mouth joints,” while the Western Zhou evolved more stable “mortise and tenon” technology [7]. There were 8 types of joint forms for vertical shaft timber frames and 4 for levels – proof that ancient Chinese mining had developed a mature, standardized construction system 3,000 years ago [7].

Shaft cross-sections were mostly square or rectangular, occasionally circular [7]. To solve drainage problems in deep shafts, miners used bamboo tubes and water troughs. For vertical lifting, they relied on wooden windlasses (the prototype of mechanical winches) [1, 6]. This timber-supported mining technique is not only the earliest in China but the oldest known in the world to use such structures – placing ancient Chinese mining technology at a world-leading level three millennia ago [1, 2, 6].

The “Super Factory” of the Bronze Age

Tongling was more than just a mine; it was a fully functional “industrial park.” Archaeologists cleared 6 sheds, 1 ore dressing plant, and 1 specialized woodcutting yard [7]. The entire chain – from timber processing and ore extraction to preliminary screening and worker living quarters – was integrated within the mining area.

Among the 468 unearthed artifacts, 18 date to the Warring States period, 214 to the Spring and Autumn period, 108 to the Western Zhou, and 124 to the Shang Dynasty [7]. Production tools include bronze axes, chisels, and adzes, alongside wooden shovels, spades, and scoops, primarily used for tunnel excavation and ore transport [1, 6]. A large quantity of daily-use pottery was also found – tripods (li), jars, stemmed bowls (dou), and basins – whose styles and decorations closely match those from the Wucheng site in Zhangshu and the Dayangzhou Shang tomb in Xingan [1, 6, 8].

Estimates suggest the total mined-out volume exceeds 200,000 cubic meters [1, 6], representing tens of thousands of tons of copper ore extracted, processed, and smelted – a steady stream of raw materials feeding the brilliant bronze casting industry of the Shang and Zhou dynasties [1, 7].

Source of Yangtze Civilization: Rewriting the Bronze Map

The discovery of Ruichang Tongling has completely rewritten the geographical understanding of Chinese bronze civilization. For a long time, the academic consensus held that “Shang culture did not cross the Yangtze River.” But Tongling, together with the Wucheng site in Zhangshu and the Dayangzhou Shang tomb in Xingan, powerfully refutes this claim [1, 8, 9].

These three sites formed the “Bronze Triangle” of Jiangxi’s bronze culture: Tongling as the raw material base providing mineral resources; Wucheng as the urban center and foundry for processing; and Dayangzhou’s royal-level tombs displaying the supreme symbols of power [9].

The pottery decorations at Tongling share similarities with Central Plains culture while maintaining distinct local Yue features [7, 9]. This suggests that during the Shang and Zhou periods, a prosperous region with thriving diverse production already existed in the middle reaches of the Yangtze, rivaling the Central Plains in its level of bronze culture development [9].

As the most complete large-scale ancient copper mine in China, Tongling was not only the material foundation of Jiangxi’s bronze civilization but also the economic precursor to early administrative divisions [2, 6, 9]. As the Jiangxi Provincial Gazetteer: Administrative Divisions notes, the earliest administrative districts were often established at the first production centers. The Tongling site and its surrounding bronze culture clusters prove that the middle and lower reaches of the Gan River and the Poyang Lake area were densely populated, economically advanced core regions of civilization 3,000 years ago [9].

References

[10] Chronicle of Jiujiang Past (5000 BC to Pre-PRC) · I. Ancient Times to Spring & Autumn Period [11] Jiangxi Provincial Gazetteer: Administrative Divisions · Chapter 1 · Administrative Affiliations Before the Qin Dynasty [12] Ruichang County Gazetteer · Preface II [13] Ruichang County Gazetteer · Major Events [14] Ruichang County Gazetteer · Vol. 1: Geography [15] Ruichang County Gazetteer · Vol. 2: Political Parties [16] Ruichang County Gazetteer · Vol. 13: Industry [17] Ruichang County Gazetteer · Vol. 23: Culture, Science & Technology [18] Ruichang County Gazetteer · Vol. 23: Culture, Science & Technology · Chapter 5: Cultural Relics and Historic Sites