diff --git a/docs/en/Blog-Posts/2020-11-12 v4_0_Preview/POST.md b/docs/en/Blog-Posts/2020-11-12 v4_0_Preview/POST.md
index 2740d33747..f776504ac0 100644
--- a/docs/en/Blog-Posts/2020-11-12 v4_0_Preview/POST.md	
+++ b/docs/en/Blog-Posts/2020-11-12 v4_0_Preview/POST.md	
@@ -1,6 +1,6 @@
 # ABP Framework 4.0 RC Has Been Published based on .NET 5.0!
 
-Today, we have released the [ABP Framework](https://abp.io/) (and the [ABP Commercial](https://commercial.abp.io/)) `4.0.0-rc.1` that is based on the .NET 5.0. This blog post introduces the new features and important changes in the new version.
+Today, we have released the [ABP Framework](https://abp.io/) (and the [ABP Commercial](https://commercial.abp.io/)) `4.0.0-rc.1` that is based on the **.NET 5.0**. This blog post introduces the new features and important changes in the new version.
 
 > **The planned release date for the [4.0.0 final](https://github.com/abpframework/abp/milestone/45) version is November 26, 2020**.
 
@@ -32,23 +32,86 @@ See the [ABP CLI documentation](https://docs.abp.io/en/abp/3.3/CLI) for all the
 
 ## Migrating From 3.x to 4.0
 
-The version 4.0 comes with some major changes including the migration from .NET Core 3.1 to .NET 5.0.
+The version 4.0 comes with some major changes including the **migration from .NET Core 3.1 to .NET 5.0**.
 
-We've prepared a detailed [migration document](https://docs.abp.io/en/abp/4.0/Migration-Guides/Abp-4_0) to explain all the changes and the actions you need to take while upgrading your existing solutions.
+We've prepared a **detailed [migration document](https://docs.abp.io/en/abp/4.0/Migration-Guides/Abp-4_0)** to explain all the changes and the actions you need to take while upgrading your existing solutions.
 
 ## What's new with the ABP Framework 4.0
 
 ### The Blazor UI
 
-The Blazor UI is now stable and officially supported.
+The Blazor UI is now stable and officially supported. The [web application development tutorial](https://docs.abp.io/en/abp/4.0/Tutorials/Part-1?UI=Blazor) has been updated based on the version 4.0.
 
-#### Breaking Changes on the Blazor UI
+#### abp bundle command
 
-TODO
+Introducing the `abp bundle` CLI command to manage static JavaScript & CSS file dependencies of a Blazor application. This command is currently used to add the dependencies to the `index.html` file in the dependency order by respecting to modularity. In the next version it will automatically unify & minify the files. The documentation is being prepared.
 
-## What's new with the ABP Commercial 3.3
+#### Removed the JQuery & Bootstrap JavaScript
 
-TODO
+Removed JQuery & Bootstrap JavaScript dependencies for the Blazor UI.
+
+>There are some other changes in the startup template and some public APIs. Follow the [Migration Guide](https://docs.abp.io/en/abp/4.0/Migration-Guides/Abp-4_0) to apply changes for existing solutions that you're upgrading from the version 3.3. While we will continue to make improvements add new features, we no longer make breaking changes on the existing APIs until the version 5.0.
+
+### System.Text.Json
+
+ABP Framework 4.0 uses the System.Text.Json by default as the JSON serialization library. It, actually, using a hybrid approach: Continues to use the Newtonsoft.Json when it needs to use the features not supported by the System.Text.Json.
+
+Follow the [Migration Guide](https://docs.abp.io/en/abp/4.0/Migration-Guides/Abp-4_0) to learn how to configure to use the Newtonsoft.Json for some specific types or switch back to the Newtonsoft.Json as the default JSON serializer.
+
+### Identity Server 4 Upgrade
+
+ABP Framework upgrades the [IdentityServer4](https://www.nuget.org/packages/IdentityServer4) library from 3.x to 4.1.1 with the ABP Framework version 4.0. IdentityServer 4.x has a lot of changes. Some of them are **breaking changes in the data structure**.
+
+Follow the [Migration Guide](https://docs.abp.io/en/abp/4.0/Migration-Guides/Abp-4_0) to upgrade existing solutions.
+
+### Creating a New Module Inside the Application
+
+ABP CLI has now a command to create a new module and add it to an existing solution. In this way, you can create modular applications easier than before.
+
+Example: Create a *ProductManagement* module into your solution.
+
+````bash
+abp add-module ProductManagement --new --add-to-solution-file
+````
+
+Execute this command in a terminal in the root folder of your solution. If you don't specify the `--add-to-solution-file` option, then the module projects will not be added to the main solution, but the project references still be added. In this case, you need to open the module's solution to develop the module.
+
+See the [CLI document](https://docs.abp.io/en/abp/4.0/CLI) for other options.
+
+### WPF Startup Template
+
+Introducing the WPF startup template for the ABP Framework. Use the ABP CLI new command to create a new WPF application:
+
+````bash
+abp new MyWpfApp -t wpf
+````
+
+This is a minimalist, empty project template that is integrated to the ABP Framework.
+
+### New Languages
+
+**Thanks to the contributors** from the ABP Community, the framework modules and the startup template have been localized to **German** (by [Alexander Pilhar](https://github.com/alexanderpilhar) & [Nico Lachmuth](https://github.com/tntwist)) and **Spanish** (by [Jose Manuel Gonzalez](https://github.com/jmglezgz)) languages.
+
+## What's new with the ABP Commercial 4.0
+
+### The Blazor UI
+
+The Blazor UI for the ABP Commercial is also becomes stable and feature rich with the version 4.0;
+
+* [ABP Suite](https://commercial.abp.io/tools/suite) now supports to generate CRUD pages for the Blazor UI.
+* Completed the [Lepton Theme](https://commercial.abp.io/themes) for the Blazor UI.
+
+### Identity Server Management UI Revised
+
+Completely revised the Identity Server Management UI based on the IDS 4.x changes.
+
+### The ABP Suite
+
+#### Auto Complete for the Navigation Property Selection
+
+While creating create/edit modals with a navigation property, we had two options: A dropdown to select the target entity and a modal to select the entity by searching with a data table. Dropdown option now supports lazy load, search and auto-complete. In this way, selecting a navigation property becomes much easier and supports large data sets on the dropdown.
+
+TODO: Screenshot
 
 ## About the Next Release