How do you usually sell your products now ?   I'm doing business through Internet now .   Oh , really ? Is it a good way ?   Yes , very good .   What advantages does it have ?   It is very convenient . You know you can browse the website and send e-mails to your customers at any time .   Yes , if we do business through other ways , it will cost a lot of time .   Also it has low cost , and you know you only need to pay the fee of Internet , which is very cheap .   Yes , going abroad to join the exhibition will cost much . But does it have any disadvantages ?   To be frank , sometimes it is not so safe as doing business through traditional ways .   You mean there may be credit problems ? 