App Store上架问题

求助：App Store上架。苹果要求采用内购，我已经集成了内购。但是仍然拒绝我。

Hello,

Thank you for revising the app.

Regarding guideline 3.1.1, we still noticed that your app enables the purchase of content, services, or functionality in the app by means other than the in-app purchase API, which is not appropriate for the App Store.

It may be appropriate to revise your app to use the in-app purchase API
ONLY
to provide content purchasing functionality.

We look forward to reviewing your resubmitted app.

Best regards,

App Store Review