二战以后，以喷射机为基础的现代航空和以计算机为基础的现代通讯迅猛发展，交通和通讯成本大大降低，为跨地区、跨国界的经济活动提供了便利条件，各国和各地区之间的经济联系越来越密切，涉及的领域越来越广泛，企业从单纯追求原料供应和产品市场，过渡到跨国投资和经营，资 After the Second World War, jet-based modern aviation and computer-based modern communications developed rapidly. Transportation and communication costs were greatly reduced, providing facilities for trans-regional and cross-border economic activities. Between countries and regions. The economic ties are getting closer and closer, and the fields involved are becoming more and more extensive. Enterprises have shifted from simply pursuing raw material supply and product markets to transnational investment and management.