Update Entity-Framework-Core-Migrations.md

docs/en/Entity-Framework-Core-Migrations.md

@@ -1,14 +1,18 @@
-# EF Core Code First Migrations
+# EF Core Advanced Database Migrations
 
-Entity Framework Core provides an easy to use and powerful [database migration system](https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/). ABP Framework [startup templates](Startup-Templates/Index.md) take the advantage of this system to allow you to develop your application in a standard way.
+This document begins by **introducing the default structure** provided by [the application startup template](Startup-Templates/Application.md) and **discusses various scenarios** you may want to implement for your own application.
+
+> This document is for who want to fully understand and customize the database structure comes with [the application startup template](Startup-Templates/Application.md). If you simply want to create entities and manage your code first migrations, just follow [the startup tutorials](Tutorials/Index.md).
 
-> See [its own documentation](https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/) to understand the EF Core Code First Migrations and why you need to such a system.
+## About the EF Core Code First Migrations
+
+Entity Framework Core provides an easy to use and powerful [database migration system](https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/). ABP Framework [startup templates](Startup-Templates/Index.md) take the advantage of this system to allow you to develop your application in a standard way.
 
 However, EF Core migration system is **not so good in a modular environment** where each module maintains its **own database schema** while two or more modules may **share a single database** in practical.
 
 Since ABP Framework cares about modularity in all aspects, it provides a **solution** to this problem. It is important to understand this solution if you need to **customize your database structure**.
 
-This document begins by **introducing the default structure** provided by [the application startup template](Startup-Templates/Application.md) and **discusses various scenarios** you may want to implement for your own application.
+> See [EF Core's own documentation](https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/) to fully learn the EF Core Code First Migrations and why you need to such a system.
 
 ## The Default Solution & Database Configuration