一、城市经济是邮政业务发展的外部条件在经济学里对需求强调两个因素：一是消费者有购买欲望，二是消费者有相应的支付能力。随着全球经济结构的调整及技术进步，邮政服务产品的需求也正经历着结构性变化，基于个人间互寄的邮政产品需求正在萎缩，而以BtoB形式为内涵的商业信 First, the urban economy is the external conditions for the development of the postal business In economics, two factors are emphasized on the demand: First, consumers have the desire to buy; Second, consumers have the corresponding ability to pay. With the adjustment of the global economic structure and technological progress, the demand for postal service products is also undergoing structural changes. The demand for postal products based on the mutual exchange of personal items is shrinking. However, the commercial letter based on the BtoB format