Short answer
Between 1839 and 1860, Britain fought two wars against China to force it to open up to trade — including the trade in opium that was devastating Chinese society. These conflicts and their aftermath, known as China's Century of Humiliation, remain central to how China understands its own modern history.
At a glance
- Key stage
- Key Stage 3
- Subject
- History
- Type
- Guide
- For
- Students
- Read time
- 6 min
- Last updated
- 21 October 2026
Where this fits
- Key Stage 3Years 7–9This article
- GCSEYears 10–11
Why did Britain want to trade opium with China?
By the early nineteenth century, European demand for Chinese goods — particularly tea, silk and porcelain — was enormous. The problem, from the perspective of British merchants and the British East India Company, was that China's Qing dynasty had little interest in European goods in return. Trade was restricted to a single port, Guangzhou (Canton), and had to be conducted through licensed Chinese merchants. The result was a persistent trade deficit: silver flowed from Britain to China and hardly any returned.
The East India Company found a solution: opium. The Company grew opium poppies in Bengal (India) and sold raw opium at auction. Traders then shipped it to China and sold it for silver, which they used to buy tea. This triangular trade balanced the books handsomely — but at enormous cost to China.
By the 1830s, China had an estimated 2–10 million opium addicts. The drug drained silver from China's economy and corrupted officials who took bribes to allow smuggling. The Qing government recognised the crisis as both a public health catastrophe and a financial emergency.
Who was Lin Zexu and what triggered the First Opium War?
Lin Zexu was a senior Qing official appointed in 1839 to suppress the opium trade. He confiscated over 1,000 tonnes of opium from British and other foreign traders at Guangzhou and destroyed it publicly — dissolving it in seawater mixed with lime and salt. He also wrote to Queen Victoria requesting she stop the trade, appealing to moral principle: "We find your country is sixty or seventy thousand li from China, yet there are barbarians who seek for gain to the undoing of others."
The British government's response was military. In 1840 a Royal Navy expedition arrived off the Chinese coast. Chinese coastal defences, based on technology a century behind British standards, were overwhelmed. The First Opium War (1839–1842) ended with the Treaty of Nanking — the first of what China calls the Unequal Treaties.
What were the Unequal Treaties?
The Unequal Treaties were a series of agreements imposed on China by Western powers after military defeats. They were "unequal" because they gave rights to foreign nationals in China without any reciprocal rights for Chinese people in foreign countries.
| Treaty | Date | Key terms |
|---|---|---|
| Treaty of Nanking | 1842 | Hong Kong ceded to Britain; five "treaty ports" opened to trade (Shanghai, Canton, Amoy, Fuzhou, Ningbo); indemnity paid by China |
| Treaty of the Bogue | 1843 | Most favoured nation status; extraterritoriality (British citizens not subject to Chinese law) |
| Treaty of Tianjin | 1858 | Eleven more ports opened; opium trade legalised; Christian missionaries given free access; diplomatic representatives in Beijing |
| Convention of Peking | 1860 | Kowloon Peninsula ceded to Britain; further concessions to France and Russia |
Extraterritoriality was particularly humiliating: it meant a British citizen who committed a crime in China would be tried by a British consul under British law — effectively placing foreigners beyond Chinese legal authority in Chinese territory. This right was extended to other Western powers and later to Japan.
What was the Second Opium War?
The Second Opium War (1856–1860) was triggered by the Arrow Incident: British officials seized a Chinese-registered but British-flagged ship called the Arrow and claimed Chinese officials had insultingly hauled down the British flag. The claim was legally dubious — the ship's British registration had expired — but it provided a pretext.
Britain, allied with France (which used the murder of a French missionary as its own pretext), launched a new campaign. Allied forces sacked and burnt the Summer Palace in Beijing — the Yuanmingyuan — in 1860, destroying thousands of irreplaceable art objects, manuscripts and scientific instruments. The act was a deliberate statement of power; it remains a raw historical wound in China's national memory.
Why does this history still matter?
China's leaders and people describe the century between the First Opium War (1839) and the Communist victory (1949) as the Century of Humiliation — a period in which China was carved up and exploited by foreign powers. This narrative shapes Chinese foreign policy, the significance attached to events like the 1997 return of Hong Kong to China, and the way Chinese politicians frame international disputes.
The historian's task is to understand this perspective without either dismissing it or treating it as the only valid interpretation. The Opium Wars were clearly an example of a powerful state using military force to compel a weaker one to accept terms against its interests — including the legalisation of a drug trade. They also occurred in a context of British industrial and military power that would have produced asymmetric relations with China regardless of the opium question. Understanding both the immediate choices made and the structural forces driving them is essential for any serious historical analysis.
Frequently asked questions
Did the British government know opium was harmful?
This is one of the most direct moral questions about the Opium Wars. Opium's addictive and destructive properties were understood by the 1830s. Debates in the British Parliament included voices arguing that the opium trade was immoral. The trade was banned in Britain itself. Nonetheless, the economic interests of the East India Company and the British government's desire to open Chinese markets meant the trade was defended rather than stopped. The gap between knowledge and action is one of the starkest aspects of the period.
How did the Opium Wars end?
The First Opium War ended with the Treaty of Nanking in 1842; the Second Opium War ended with the Convention of Peking in 1860. Both treaties heavily favoured Britain and other Western powers, opening new Chinese ports to trade, granting extraterritorial rights and requiring China to pay large indemnities. The Qing dynasty, already weakened by the devastating Taiping Rebellion (1850–1864, which killed an estimated 20–30 million people), never fully recovered from the combination of internal revolt and external pressure.
When was Hong Kong returned to China?
Hong Kong was leased to Britain for 99 years by the Convention of Peking Extension in 1898. It was returned to China on 1 July 1997, under the principle of "one country, two systems" — meaning Hong Kong retained its own legal and economic system, separate from mainland China's, for 50 years. The return was a moment of enormous symbolic importance to China, directly connected to the Opium War narrative.
How do Chinese school textbooks treat the Opium Wars?
Chinese school history presents the Opium Wars as the defining starting point of the Century of Humiliation — a moment when a once-great civilisation was bullied by aggressive foreign powers. This framing differs significantly from some Western histories that have emphasised economic motives, treaty-port commerce, and Chinese government weaknesses rather than foreign aggression. Both perspectives contain accurate elements; neither alone gives the full picture. Comparing how different nations teach the same event is itself a valuable historical skill.
Want to practise evaluating evidence from different national perspectives on the Opium Wars? Professor Harari at aitutors.me will push your historical thinking further.
Key terms
- Century of Humiliation
- Lin Zexu
- First Opium War
- Treaty of Nanking
- Unequal Treaties
- extraterritoriality
- Arrow Incident
- Summer Palace