Ming Haijin Sea Ban (1371): China Closes Its Coasts to Trade

The Ming haijin, or “sea ban”, was a policy first decreed by the Hongwu Emperor in 1371 that forbade the people of China’s coast to go to sea and trade privately with foreigners. Foreign commerce was to pass only through official tribute missions. The ban, renewed many times, shaped East Asian trade for nearly two centuries and helped produce the very piracy and smuggling it was meant to prevent.

Background

Zhu Yuanzhang proclaimed the Ming dynasty in 1368 after years of civil war (see Hongwu Emperor and the founding of the Ming). Two of his defeated rivals, Zhang Shicheng and Fang Guozhen, had drawn strength from the rich coastal regions of Zhejiang and Jiangsu, and some of their followers fled to offshore islands. At the same time, raiders known as wokou (“Japanese pirates”) attacked the coasts of Korea and China, profiting from civil war in Japan.

The new emperor also held a deeply agrarian vision. He distrusted merchants, wanted villagers fixed to the land, and believed that relations with foreign rulers should express their submission to the Son of Heaven through tribute.

The ban and the tribute system

In 1370 the Ming had set up Maritime Trade Offices at Ningbo, Quanzhou and Guangzhou to supervise official foreign trade. Then, according to the official Ming records, the emperor ordered in 1371 that coastal people must not go out to sea privately. The superintendencies were closed in 1374, and the ban was repeated and tightened in 1381, 1390, 1394 and 1397. One order even forbade the use of foreign perfumes and goods.

Under this system, foreign states could trade only by sending tribute missions on a fixed schedule, using official documents and entering through designated ports. Envoys presented local products to the emperor and received generous gifts in return, while limited trade took place under supervision. Japan, Korea, the Ryukyu kingdom and Southeast Asian states all participated. In the early 15th century Ashikaga Yoshimitsu accepted the title “King of Japan” from the Ming so that Japan could join this licensed trade.

The court itself remained active at sea. The Yongle Emperor sent Zheng He’s treasure voyages across the Indian Ocean between 1405 and 1433. These were state expeditions, consistent with the principle that overseas contact belonged to the emperor rather than private merchants.

Enforcing the ban was difficult along a coastline thousands of kilometres long. The Ming built coastal forts and garrisons, and in some places ordered islanders to move to the mainland. Coastal communities that had lived from fishing and trade for generations lost much of their livelihood, and many quietly ignored the rules whenever officials looked away.

Smuggling and piracy

Demand for Chinese silk and porcelain, and Chinese demand for Japanese and later American silver, did not disappear. Merchants from Fujian and Zhejiang traded illegally from offshore islands such as Shuangyu near Ningbo, often protected by local gentry families. When the state cracked down in the 1540s, many traders turned to armed raiding.

The great wokou raids of the 1550s ravaged the lower Yangzi and the south-east coast. Despite the name, Ming officials themselves noted that most raiders were Chinese, working alongside Japanese and others. The best-known leader, the merchant Wang Zhi, was lured to surrender and executed in 1560. Generals such as Qi Jiguang eventually defeated the raiders in the 1560s.

Relaxation in 1567

After the death of the Jiajing Emperor, the new Longqing Emperor approved a proposal from Fujian officials in 1567. Private merchants were licensed to sail from Yuegang, the “Moon Harbour” at Haicheng near Zhangzhou, to Southeast Asia. Trade with Japan stayed illegal. Licensed trade boomed, and large amounts of silver flowed into China, much of it from Spanish Manila after 1571. Meanwhile the Portuguese had been allowed to settle at Macau from about 1557.

Myths and facts

• Myth: Ming China cut itself off from the world. Fact: the ban restricted private sea trade, not all foreign contact. Tribute trade, state voyages and large-scale smuggling continued.
• Myth: the wokou were simply Japanese. Fact: contemporary Chinese sources acknowledge that many, often most, 16th-century raiders were Chinese.
• Myth: the ban ended Chinese seafaring after Zheng He. Fact: Chinese merchants kept sailing illegally and, after 1567, legally from Fujian.

Timeline

• 1368: the Ming dynasty is founded.
• 1370: Maritime Trade Offices set up at Ningbo, Quanzhou and Guangzhou.
• 1371: the Hongwu Emperor forbids coastal people to go to sea privately.
• 1374: the Maritime Trade Offices are abolished.
• 1394: the ban is reinforced, including a prohibition on foreign goods.
• 1405–1433: Zheng He’s state voyages.
• 1550s: peak of wokou raiding along the south-east coast.
• 1567: private trade to Southeast Asia is licensed at Yuegang.

Why it matters

The haijin shows how a dynasty’s security fears and ideals shaped the economy of a whole region. By outlawing a trade it could not stop, the Ming pushed commerce into the hands of smugglers and pirates, a lesson in the limits of state power that later helped persuade the court to reopen its ports.