Set sales is a sales model, which is now a very popular way of selling. With this way of selling a lot of manufacturers, product range essentially covers all types of goods. The most common things of daily trail, such as non-woven bags and so on. Even now some of the activities focus on sales of tickets can be used in this way. For example, last year’s Shanghai World Expo will focus on the use of the ticket sales the way. And now, with Apple’s Mac App Store on-line, centralized software sales era is coming.