reviews of products to help potential customers choose the products they are looking for. But this kind of reviews could only be found in e-commerce malls, and there are still not enough interactions between users because this is not based on social relationships. Integrating social media with e-commerce may be a possible solution. So, our research questions are: What kind of role does social media play in the e-commerce context? And how shall we use social media to enhance e-commerce?