广告类商业信函和帐单类商业信函的比较浙江省邮电管理局杨世忠自我国实行改革开放，发展社会主义市场经济以来，邮政业务结构发生了很大变化，传统业务发展趋缓，新型业务快速增长。同时，信函业务也发生了较大的变化，报平安的家信下降而商业信函却大量增加。邮政业务结... Comparison of Commercial Correspondences on Commercial Correspondences and Billing Books Zhejiang Provincial Administration of Posts and Telecommunications Yang Shizhong Since the implementation of the policy of reform and opening up and the development of a socialist market economy in our country, the structure of the postal service has undergone great changes. The development of traditional businesses has slowed down and the growth of new businesses has grown rapidly . In the meantime, major changes have taken place in the letter business as well. However, there has been a decline in business correspondence and a substantial increase in commercial correspondence. Post business knot ...