> For the complete documentation index, see [llms.txt](https://lianlianpay.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lianlianpay.gitbook.io/docs/master.md). # Introduction Welcome to [LianLian](https://lianlianpay.gitbook.io/docs/). Get started with following products: * [Easypay Payment](/docs/easy-payment/easypay.md), a pure card payment solution for domestic cards in China mainland. * [Online banking Payment](/docs/online-banking-payment/online-banking-overview.md), allows you to accept online banking payment. * [Exchange Payment](/docs/exchange-payment/exchange-payment-overview.md), enables the capability of Chinese customers to make payment in CNY for goods which is sold in [other currencies](/docs/development/supported-currencies.md). * [Aggregate Payment](/docs/aggregate-payment/aggregate-overview.md), allows you to accept payments with multiple payment methods. ## Terminologies | Terminology | Interpretation | | ------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Card binding | Card binding is an operation to generate a special parameter `no_agree` which is used to take place of card information, thus you can use `no_agree` for further charge requests without card information | | Asynchronous Notification | An asynchronous HTTP request sent from LianLian to you which is to notify the results of corresponding operation | | Signature | A digital signature which used for message verification between you and us | ## Technical Support If you have any questions about development or use of our API, please contact the relevant technical colleague of LianLian by e-mail or phone. | Name | Mobile Phone | Email | | ------------------- | ------------ | ------------------------------ | | Tech Supports Group | N/A | |