Update send-your-data.mdx

pages/guides/implement/send-your-data.mdx

@@ -120,8 +120,11 @@ Do note that the mixpanel.identify() call does not create a User Profile in Mixp
 For more detailed user flows and FAQs refer to our documentation on [Identifying Users](/docs/tracking-methods/id-management/identifying-users).
 
 ## Backfilling Historical Data 
-Migration from specific tools: https://docs.mixpanel.com/docs/migration/overview 
-If your data resides in warehouse: https://docs.mixpanel.com/docs/tracking-methods/data-warehouse 
-Other tools: Import API docs, Python util API  
+If you've been collecting data elsewhere and want to analyze it on Mixpanel, you can backfill these historical data into Mixpanel.To backfill data to Mixpanel, you need to understand Mixpanel data model.  We've detailed migration processes from analytics tools like Amplitude and Google Analytics here https://docs.mixpanel.com/docs/migration/overview
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+For those with historical data stored in a data warehouse, bring it into Mixpanel through our data warehouse integration https://docs.mixpanel.com/docs/tracking-methods/data-warehouse
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+Even if you don't have a data warehouse and are using alternative tools without native support, you can use Import API and Engage API to import historical data into Mixpanel https://developer.mixpanel.com/reference/import-events 
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