The Underwater Archaeology of Chinese Ships: What Shipwrecks Tell Us About Maritime Trade

🐚 Why Shipwrecks Matter: Evidence That Survives When Documents Don't

Chinese maritime history is documented in official dynastic records, merchant accounts, and foreign travellers' reports — but these sources tend to describe what was traded and where ships went, not how the vessels were actually built. Underwater archaeology fills this gap by preserving the physical object: the hull planking, the bulkhead frames, the fastening methods, and the cargo stowage arrangements that no written source describes in sufficient detail.

Wrecks also provide unambiguous dating evidence. A ship that sank with its cargo intact offers a fixed point in time — the ceramics, coins, and goods aboard can be dated independently, anchoring the vessel's construction to a specific period. This is particularly valuable for understanding how Chinese shipbuilding techniques evolved across dynasties.

The distribution of Chinese wrecks across Southeast Asian, South Asian, and East African waters also maps the actual reach of Chinese maritime trade more precisely than port records alone, which tend to document only the endpoints of voyages rather than the routes taken.

🚢 The Nanhai No. 1: China's Most Significant Maritime Find

Discovered in 1987 during a joint Chinese-British survey and formally raised in 2007, the Nanhai No. 1 is a Song dynasty merchant vessel dating to approximately the 12th century CE. It was recovered largely intact from the seabed of the South China Sea near Yangjiang, Guangdong, and is now housed in a purpose-built climate-controlled museum — the Maritime Silk Road Museum — where excavation continues in controlled conditions.

The vessel measures approximately 30 metres in length and carried a cargo of over 180,000 artefacts, primarily ceramics from Fujian and Jiangxi kilns, along with iron goods and personal items belonging to the crew and passengers. The sheer volume of cargo provides direct evidence of the scale of Song dynasty export trade in ceramics — a trade documented in written sources but rarely visible in such physical detail.

Structurally, the Nanhai No. 1 preserves multiple watertight bulkheads — a Chinese shipbuilding innovation documented in texts from the Tang dynasty onward — in their original configuration. This physical confirmation of a technique long described in historical sources has been significant for maritime historians studying the development of Chinese hull design.

🏺 The Quanzhou Ship: A Window into Yuan Dynasty Construction

Excavated from the silted harbour of Quanzhou, Fujian in 1974, the Quanzhou ship dates to the late 13th century — the transition between the Song and Yuan dynasties. It is one of the most thoroughly studied examples of a Chinese ocean-going trading vessel, and its construction details have informed scholarly understanding of how Chinese shipbuilders approached hull design for deep-water voyaging.

The vessel's hull uses a combination of flush-laid and overlapping planking, with multiple layers of planking in some sections — a technique associated with strength and water resistance in Chinese boatbuilding practice. Iron nails and wooden dowels were used in combination, and the remains of caulking material — a mixture of tung oil and lime — were identified in the seams, consistent with methods described in later Chinese shipbuilding manuals.

The cargo included fragrant wood, pepper, betel nuts, and cowrie shells — goods consistent with trade from Southeast Asia and the Indian Ocean region, supporting Quanzhou's documented role as a major entrepôt in the medieval maritime trade network.

🌊 The Black Stone Wreck: Tang Dynasty Trade with the Arab World

Recovered off Belitung Island, Indonesia in 1998 by commercial salvors and subsequently studied by the Asian Civilisations Museum, Singapore, the Black Stone wreck is an Arab dhow — not a Chinese vessel — but its cargo is almost entirely Chinese. The ship carried approximately 60,000 Tang dynasty ceramics, including a significant quantity of Changsha ware from Hunan province, along with gold and silver objects.

The wreck dates to around 830 CE, making it the earliest known physical evidence of direct maritime trade between Tang China and the Arab world. Its significance for Chinese maritime history lies in what the cargo reveals: the scale, organisation, and geographic reach of Chinese ceramic export in the 9th century, a period for which documentary evidence is relatively sparse.

The vessel's Arab construction — sewn-plank rather than nailed — also illustrates the diversity of ship types that participated in the maritime trade networks centred on Chinese ports, a diversity that Chinese written sources tend to underrepresent.

🇺🇳 The Sinan Wreck: Yuan Dynasty Ceramics in Korean Waters

Excavated off the coast of South Korea between 1976 and 1984, the Sinan wreck is a Yuan dynasty vessel that sank in the early 14th century while carrying a cargo of Chinese goods — primarily ceramics — from Ningbo to Japan. The National Museum of Korea recovered over 20,000 ceramic pieces, along with coins, lacquerware, and medicinal herbs.

The vessel's route — from a major Chinese port northward through the East China Sea — documents a trade corridor that is well-attested in written sources but rarely visible in physical form. The cargo's composition, with ceramics from multiple Chinese kilns, suggests the vessel was aggregating goods from different production centres before departure, consistent with the role of Ningbo as a consolidation port in the Yuan dynasty trade system.

The Sinan wreck's hull construction, studied during excavation, shows characteristics consistent with Chinese boatbuilding practice of the period, including the use of iron fastenings and multiple planking layers in the bottom strakes.

🏛️ What Wrecks Tell Us About the Craft Behind the Models

The construction techniques documented in these wrecks — watertight bulkheads, multi-layer planking, tung oil caulking, iron and wooden fastenings — are not merely historical curiosities. They represent a coherent system of boatbuilding that developed over centuries and was still being practised in modified form in Chinese coastal communities well into the 20th century.

The Zhoushan workshop tradition, established in 1980, draws on knowledge of these construction methods as they survived in the archipelago's boatbuilding community. The models produced there reflect hull proportions, planking arrangements, and rigging configurations that are consistent with the vessel types documented in the archaeological record — not as reproductions of specific wrecks, but as expressions of a construction tradition that the wrecks help to date and contextualise.

In this sense, the handcrafted ship model and the excavated wreck are related objects: one preserved by accident on the seabed, the other made deliberately by craftsmen whose knowledge comes from the same tradition the wrecks document.

Chinese Fu Chuan Junk Ship Model — Hand-carved in the Zhoushan workshop tradition using rosewood and hardwood, reflecting hull proportions and construction methods consistent with ocean-going Chinese trading vessels of the Song and Yuan dynasties.