Edward Duncan, Painting (1843), Wikimedia Commons, Public Domain
The Treaty of Nanjing was signed on August 29, 1842, marking a pivotal moment in East Asian history. This unequal treaty concluded between Qing China and Britain after the First Opium War and set the stage for China’s tumultuous encounters with Western imperial powers.
Throughout the late 18th century, Britain significantly profited from smuggling opium produced in India into China. Indian opium exported to China surged from 1,000 chests in 1773 to 40,000 by 1839. As opium addiction caused escalating social problems, the Qing government attempted to curb the trade with stringent regulations.
To enforce the ban, the Qing government dispatched Lin Zexu to Guangdong to confiscate opium, severely impacting British traders. In retaliation, Britain opted for military intervention. Despite vocal opposition from the British politician William Gladstone, who denounced the conflict as unjust, the British Parliament passed the war resolution with a narrow majority—271 votes to 262.
In 1840, Britain invaded China with a formidable naval fleet. The Qing army, outmatched by Britain’s modern weaponry, saw major ports fall into British hands. The conflict extended into the Yangtze River basin, with British forces pushing further inland. By 1842, the Qing Dynasty capitulated and signed the Treaty of Nanjing.
The terms of the Treaty of Nanjing were heavily skewed against the Qing Dynasty. Hong Kong was ceded to Britain, and China had to pay a substantial indemnity. The treaty also forced the opening of five key ports—Guangzhou, Shanghai, Ningbo, Fuzhou, and Xiamen—and granted British nationals the right to reside and conduct business freely within China.
The First Opium War and the Treaty of Nanjing marked a significant turning point in modern Chinese history. The Qing Dynasty’s authority weakened, paving the way for further Western invasions. In the wake of this treaty, other Western nations soon imposed similar unequal agreements on China.