Query the order status of other shopping websites (such as excellence and Dangdang) (that is, tracking orders)

Query the order status of other shopping websites (such as excellence and Dangdang) (that is, tracking orders). now I am working on a shopping return website. The website itself does not sell anything, instead, let the user go to Dangdang excellence and other websites to buy things through my website, and then return the cash that Dangdang excellence gave to me to the user. Dangdang superior will give me some order information, but it seems to be a feedback on the web interface, I do not know there is no interface to query other shopping sites (such as excellence, Dangdang) order status (that is, tracking orders)
Now I am creating a shopping return website. The website itself does not sell things, but allows users to go to Dangdang excellence and other websites to buy things through my website, then, return the cash that Dangdang gave me and the user. Dangdang superior will give me some order information, but it seems that there is no interface or other feedback on the web interface. How can I track users' orders on Dangdang and other websites. I hope some friends who have worked on such projects can help me solve the problem.

Similarly, this is similar to the CPS business of the advertising alliance system (pay by effect). I just don't know how to track the "effect ", that is, the user's registration or purchase behavior from other websites that I visited is tracked.

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It should be theoretically possible to achieve acquisition.
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Cross-site submission, regular expressions
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If they don't give you feedback, you won't be able to trace it.
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This theory may be called web services.

Overseas shopping websites are common. you can also sell them as agents and get them back!

API specifications
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They don't provide this service, and you cannot get it.







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Mark.