I used react-router V2 before, so it was no problem to write route nesting like this:

Purpose: The Main_page component will be loaded when accessing different paths. Subcomponents such as Abstract or React_tutorial will be rendered in the Main_page component according to different paths. These subcomponents can be referenced through props children in the Main_page component.

But now after upgrading to version V4, I can no longer play. Please tell me what should I do to achieve the above purpose in version V4?