diff --git a/examples/dependency/definition.yaml b/examples/dependency/definition.yaml
index acf5fc47..3bc3e0c5 100644
--- a/examples/dependency/definition.yaml
+++ b/examples/dependency/definition.yaml
@@ -24,7 +24,7 @@ spec:
 apiVersion: core.oam.dev/v1alpha2
 kind: TraitDefinition
 metadata:
-  name: foo.example.com
+  name: foos.example.com
 spec:
   definitionRef:
     name: foo.example.com
diff --git a/examples/dependency/demo.yaml b/examples/dependency/demo.yaml
index 8fc7ff1c..72a126d9 100644
--- a/examples/dependency/demo.yaml
+++ b/examples/dependency/demo.yaml
@@ -9,14 +9,16 @@ spec:
     metadata:
       name: source
     # Uncomment the following and apply again will make dependency satisfied.
-    # status:
-    #   key: test
     status:
-      key:
-        - name: a
-          value: aa
-        - name: b
-          value: bb
+      key: test
+
+    # Uncommnet below to test append array
+    # status:
+    #   key:
+    #     - name: a
+    #       value: aa
+    #     - name: b
+    #       value: bb
 ---
 apiVersion: core.oam.dev/v1alpha2
 kind: Component
@@ -28,10 +30,12 @@ spec:
     kind: Foo
     metadata:
       name: sink
-    spec:
-      key:
-        - name: exist
-          value: existtt
+
+    # Uncommnet below to test append array
+    # spec:
+    #   key:
+    #     - name: exist
+    #       value: existtt
 ---
 apiVersion: core.oam.dev/v1alpha2
 kind: ApplicationConfiguration
@@ -49,3 +53,17 @@ spec:
             dataOutputName: example-key
           toFieldPaths:
             - "spec.key"
+
+      # Uncomment to test trait
+      # traits:
+      #   - trait:
+      #       apiVersion: example.com/v1
+      #       kind: Foo
+      #       metadata:
+      #         name: source
+      #       # Uncomment the following and apply again will make dependency satisfied.
+      #       # status:
+      #       #   key: test
+      #     dataOutputs:
+      #       - name: example-key
+      #         fieldPath: status.key