In October 1993, China, Myanmar, Thailand, Laos and the UNDCP signed the Memorandum of Understanding on Narcotic Drugs Control, which stressed keeping contacts between high officials to further the cooperation in drug control in the sub-region.

• 1993年10月，中国、缅甸、泰国、老挝和联合国禁毒署签署《禁毒谅解备忘录》，确定在次区域禁毒合作中保持高级别接触。