diff --git a/chapi-ast-cpp/build.gradle.kts b/chapi-ast-cpp/build.gradle.kts
index 16d7daf0..fd8e3380 100644
--- a/chapi-ast-cpp/build.gradle.kts
+++ b/chapi-ast-cpp/build.gradle.kts
@@ -21,8 +21,8 @@ dependencies {
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.3.2")
 
     implementation(kotlin("stdlib-jdk8"))
+    // Kotlin's reflection.
     implementation(kotlin("reflect"))
-    // Kotlin reflection.
     testImplementation(kotlin("test"))
 
     // JUnit 5
diff --git a/docs/quick-start.md b/docs/quick-start.md
index 2683c9f5..b93a31ea 100644
--- a/docs/quick-start.md
+++ b/docs/quick-start.md
@@ -61,3 +61,16 @@ public static void main(String[] args) {
 }
 ```
 
+## 3. Use the AST
+
+Use the following code to use the AST:
+
+```java
+import chapi.ast.javaast.JavaAnalyser;
+
+// main
+public static void main(String[] args) {
+    JavaAnalyser analyser = new JavaAnalyser();
+    List<CodeContainer> containerList= analyser.parse("public class HelloWorld { public static void main(String[] args) { System.out.println(\"Hello, World\"); } }", "HelloWorld.java");
+    // handle the containerList
+```
diff --git a/docs/usecases/usecases.md b/docs/usecases/usecases.md
index 94335677..d2f7f65a 100644
--- a/docs/usecases/usecases.md
+++ b/docs/usecases/usecases.md
@@ -6,3 +6,11 @@ has_children: true
 permalink: /usecases
 ---
 
+- [ArchGuard](https://github.com/archguard/archguard) - ArchGuard is an architecture workbench, also for architecture
+  governance, which can analysis architecture in container, component, code level, create architecture fitness
+  functions,
+  and analysis system dependencies.
+- [UnitGen](https://github.com/unit-mesh/unit-gen) is a code fine-tuning data framework that generates data from your
+  existing codebase.
+- [ChocolateFactory](https://github.com/unit-mesh/chocolate-factory) is a cutting-edge LLM toolkit designed to empower
+  you in creating your very own AI assistant.