AdvertisementChina Blacklists Carfentanil, Closing A Deadly LoopholeFebruary 16, 2017Bill ChappellfacebookEmailMembers of the Royal Canadian Mounted Police go through a decontamination procedure after intercepting a package containing around 1 kilogram (2.2 pounds) of the powerful opioid carfentanil, imported from China to Vancouver. China has now added the drug to its list of controlled substances. (AP)