Since the 1980s, transnational smuggling and trafficking of precursor chemicals and of ephedrine have increased rapidly in tandem with the prevalence of the global drug problem and the extended production of chemosynthesized drugs.

• 八十年代以来，随着世界毒品问题的泛滥和化学合成毒品生产的扩张，跨国走私、贩运各种易制毒化学品和麻黄素活动剧增。