The British won.
Opium War or the Anglo-Chinese War, was a series of military engagements fought between Great Britain and the Qing dynasty of China. Chinese officials clamped down on the banned opium trade, and threatened the death penalty to future offenders, causing offence toward the British government. The British dominated the trade and were much stronger militarily. They defeated the Chinese, and imposed a penalty that gave Western powers special privileges to trade with China.