0.URL
1. Functions
1. Purchase software online on a time-by-time basis
2. Support: Alipay, PayPal
3. Online authorization of the purchased software
4. User roles: ordinary users, agents, administrators
5. Card password: agent purchase, user recharge, agent cancellation
6. Multi-language: Chinese, English
Second, technology
1. Language: C#, HTML
2. Database: SqlServer
3. Web page
4、WebService
3. Interface
