Why did Qing laws against opium fail to stop the trade?

Qing dynasty laws against the opium trade failed primarily because the prohibitions themselves fostered widespread corruption among the officials and soldiers tasked with enforcement. As the trade became highly profitable, these officials often colluded with smugglers to facilitate the illegal distribution of the drug throughout China.123

Furthermore, the opium trade was driven by powerful external economic forces that the Qing government could not control domestically. British and other Western merchants, seeking to resolve a chronic trade imbalance caused by the high demand for Chinese tea, silk, and porcelain, aggressively pushed opium into the Chinese market. Because the foreign side of the supply chain operated outside of Chinese legal jurisdiction, imperial commissioners like Lin Zexu struggled to reach the root of the problem, despite making headway against local smuggling networks. Ultimately, the trade was sustained by the immense profits it generated for foreign interests and the systemic corruption it engendered within the Chinese administration, rendering domestic bans ineffective until the trade was eventually regulated through international agreements in the early 20th century.123