http://www.geopium.org/drugtradeinasia.html
http://www.geopium.org/JIR2.htm
Further south along the Thai border and lower on the Mekong, Cambodia is also increasingly used as a staging point for trafficking methamphetamine via Trat and Chanthaburi into Thailand. East of Laos and Cambodia, Vietnam has similarly been turned into a drug trafficking route, either from or to China. Overseas trafficking is frequently organised from Vietnamese seaports such as Hoi Anh, Danang, Vinh and Haiphong or from the Cambodian Koh Kong province or Pochentong airport (Phnom Penh). Vietnam is also a destination for Myanmar heroin, the Hekou-Lao Cai border crossing being one of the most frequently used. Laos was thus originally used to bypass such added taxes. Now, however, it is the tough anti-drug policy of Thai authorities that is driving traffickers towards alternative routes such as Laos and Cambodia.