In October 1993, China, the Laos, Myanmar and Thailand signed the Memorandum of Understanding on Narcotic Drugs Control with the UN Drug Control Program, deciding to maintain high-level contacts in sub-region drug control cooperation.

• 1993年10月，中国、老挝、缅甸、泰国和联合国禁毒署签署了《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；