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。