diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 44d76d3..09a0004 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,5 +1,35 @@
 # How to contribute to LibCmo21
 
-## Contributor Limit
+## Contributor Limitation
 
 This project does not allow contributions coming from employees who are or have been employees of Dassault.
+
+## Feature Limitation
+
+For the content of contribution, not all contribution will be accepted.
+Just like I said, we create **Minimalist** Virtools Environment.
+The basic RW functions is enough.
+We do not accept complex function implementations.
+There are 3 lists which indicate our accept guideline.
+
+### Wanted Features
+
+These features will be accepted as soon as possible.
+
+* The bug fix of any existing code.
+
+### Not Urgent Features
+
+These features are in plan, but not urge to merge.
+
+* The `CK_ID` remap system of Reader.
+* CK3dEntity hierarchy system.
+* Other CK classes implementations.
+* Non-Virtools 2.1 implementations.
+
+### Don't Care Features
+
+These features explicitly will not be merged.
+
+* Run Virtools file.
+* Plugin system.
diff --git a/DEVNOTE.md b/DEVNOTE.md
index 3b46385..c12f66d 100644
--- a/DEVNOTE.md
+++ b/DEVNOTE.md
@@ -2,6 +2,15 @@
 
 This article tells the details of this project for the developer of this project.
 
+## Version
+
+When bumping a new version, you should update the version number in following files:
+
+* `CMakeLists.txt`: It control the version of `LibCmo`, `Unvirt`, `BMap` and `BMapInspector`. All of these projects share the same version.
+* `Assets/BMapBindings/pybmap/pyproject.toml`: The version of `BMap` Python binding. It should have the same version with `BMap` but not compelled.
+* `Assets/BMapBindings/BMapSharp/BMapSharp/BMapSharp.csproj`: The version of `BMap` C# binding. Same as above.
+* TODO
+
 ## Java
 
 ### Java
diff --git a/README.md b/README.md
index dfefe67..b954cd3 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ This project will not link any original Virtools dynamic library. So this projec
 
 This project only involving specific Virtools version, 2.1. Other too higher Virtools versions are not considered by this project.
 
-This project is barely based on the reverse work of doyaGu who decompile `CK2.dll`, `VxMath.dll` and `CK2_3D.dll`. The program [unvirt](https://aluigi.altervista.org/papers.htm#unvirt) created by Luigi Auriemma, which is licensed by GPL-v2, also help my work.
+This project is barely based on the reverse work of doyaGu who decompile `CK2.dll`, `VxMath.dll` and `CK2_3D.dll`. The program [unvirt](https://aluigi.altervista.org/papers.htm#unvirt) created by Luigi Auriemma, which is licensed by GPL-v2, also inspire my work.
 
 **The difference between this project and other Virtools libraries (e.g. [doyaGu/Ballanced](https://github.com/doyaGu/Ballanced)), is that this project is not focusing on re-creating the whole Virtools engine. This project only focus on the Virtools files RW, and it only just implement a minimalist Virtools environment for achieving this.**
 
@@ -35,7 +35,7 @@ The ultimate goals of this project are:
   - Create a Python binding for the loader. And allow user can export Ballance Map from Blender on Linux platform natively.
   - Create a C# binding for the loader to enable that I can load Ballance Map in Godot on Linux / Android platform natively.
 
-These goals are now all achieved.
+These goals now are all achieved.
 
 ## Project Layout
 
@@ -43,37 +43,11 @@ These goals are now all achieved.
 * Unvirt: Interactive Virtools file viewer. Can provide more detail than Luigi Auriemma's unvirt.
 * Ballance: Ballance related stuffs which utilize LibCmo.
   - BMap: A dynamic library which is specific for Ballance Map loading and saving.
-  - BMapInspector: A inspector for checking Ballance Map.
+  - BMapInspector: An inspector for checking Ballance Map.
 
 ## Contributions
 
-However, not all contribution will be accepted.
-
-For the limitation of contributor, please see [Contribution Guideline](./CONTRIBUTING.md).
-
-For the content of contribution, just like I said, we create **Minimalist** Virtools Environment. The basic RW functions is enough. We do not accept complex function implementations. There are 3 lists which indicate our accept guideline.
-
-### Wanted Features
-
-These features will be accepted as soon as possible.
-
-* The bug fix of any existing code.
-
-### Not Urgent Features
-
-These features are in plan, but not urge to merge.
-
-* The `CK_ID` remap system of Reader.
-* CK3dEntity hierarchy system.
-* Other CK classes implementations.
-* Non-Virtools 2.1 implementations.
-
-### Don't Care Features
-
-These features explicitly will not be merged.
-
-* Run Virtools file.
-* Plugin system.
+See [Contribution Guideline](./CONTRIBUTING.md)
 
 ## Compile