电子商务是通过互联网技术在网络上 的虚拟空间内实现传统的商务活动。它是互联网时代传统商务活动的必然发展方向。电子商务主要可以分为企业与消费者（Ｂ２Ｃ）的电子商务和企业与企业（Ｂ２Ｂ）之间的电子商务。企业之间的电子商务又可以分为电子销售和电子采购。很多大型的 E-commerce is the realization of traditional business activities in the virtual space on the Internet through Internet technology. It is the inevitable development of the traditional business activities in the Internet era. E-commerce can be mainly divided into business-to-consumer (B2C) e-commerce and e-commerce between businesses and businesses (B2B). E-commerce between enterprises can be divided into electronic sales and e-procurement. A lot of big ones