diff --git a/Building-With-Android-Build-System.md b/Building-With-Android-Build-System.md
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--- a/Building-With-Android-Build-System.md
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@@ -1 +1,39 @@
-soon!
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+This guide is for integrating the [PMT Renovated](https://github.com/ShawkTeam/pmt-renovated) project into the Android build system.
+
+## 1. Downloading or Cloning the Source
+
+You can add the project in two ways:
+
+- **Place in external directory:**  
+  ```bash
+  git clone https://github.com/ShawkTeam/pmt-renovated external/pmt
+  ```
+
+- **Place in the device tree:**  
+  ```bash
+  git clone https://github.com/ShawkTeam/pmt-renovated device/<vendor>/<device>/pmt
+  ```  
+  If added to the device tree, add the following line in your **device.mk**:  
+  ```make
+  PRODUCT_SOONG_NAMESPACES += $(DEVICE_PATH)
+  ```
+
+## 2. Including in Recovery
+
+To include the project in the recovery image, add the following to `device.mk`:
+
+```make
+PRODUCT_PACKAGES += pmt.recovery
+```
+
+## 3. Including in Normal ROM or System Image
+
+To include the project in the normal ROM or system image, add the following to `device.mk`:
+
+```make
+PRODUCT_PACKAGES += pmt
+```
+
+---
+
+Now, the PMT Renovated project will be part of your selected build target.