Tensions over the opium trade and Chinese efforts to halt British smuggling erupted into naval skirmishes near Chuenpi, close to Canton (Guangzhou). British warships fired on Chinese vessels attempting to enforce a blockade, foreshadowing the full-scale First Opium War that would erupt the following year and reshape China's relationship with the West for a century.
The immediate spark was Britain's refusal to hand over sailors accused of killing a Chinese villager, combined with Commissioner Lin Zexu's aggressive campaign to stamp out the opium trade that was flooding China with British-Indian narcotics and draining its silver reserves.
When Chinese war junks tried to enforce a blockade against British shipping near the Pearl River, Royal Navy vessels responded with superior firepower, sinking or damaging Chinese ships with comparative ease—an early demonstration of the technological gap that would define the coming war.
The skirmish was a prelude to a conflict that ended catastrophically for China: the 1842 Treaty of Nanking ceded Hong Kong to Britain, opened treaty ports, and inaugurated what Chinese historians call the 'century of humiliation,' a period of unequal treaties and foreign intervention that still shapes Chinese political memory today.