Hey @Jiangxiankang, welcome to the Community! 🎉
Is the linked page contained within the content of the RSS feed item?
If so, then perhaps you could use the AI by Zapier action to extract the link that needs to be passed to the Web Parser action. It has an Analyze and Return Data action that could be used to extract the desired link from the RSS feed item. You can learn more about how to use that type of action here: Use AI by Zapier to add a built-in AI action.
Alternatively, you could try using a Formatter (Text > Extract URL) action to extract the link. See our Extract data in Zaps guide to learn more.
Hope that helps. If you run into any issues on that or have any more questions, just let me know! 🙂