Since the computer comes into being, it develops so fast, today, we can do many things in the computer, such as make friends, check the news and so on. With the computer, people like to purchase online, it not only saves time, but also saves the money. The newly developed way of shopping online is called group purchase, the special thing lies in that it provide the product with low price. As so many people buy the product, so the manufacturer still earn lots of profit, so they are willing to sell on the low price. While the problem comes, low price always means bad quality, group purchase provides the customers not that good quality. So when we buy in group purchase, we need to take care.