Hello , Fred . What are you doing ?   I'm doing the business online .   Can you tell me the concept of e-commerce ? Now , many people mentioned the word , ' e-commerce ' , in front of me .   E-commerce , or Electronic Commerce is the practice of purchasing and selling products or services over the Internet .   What kinds of channels can you use in e-commerce ?   We can complete a trade by email , electronic data interchange and smart cards , and so on .   What are the benefits of e-commerce ?   Firstly , it can overcome the geographic limitation . And secondly , e-commerce can lower the internal costs . And thirdly , people like us , can also open stores on Internet .   How things have changed now ! 