diff --git a/module/misc/control.php b/module/misc/control.php
index 548669a263..996d0ec903 100644
--- a/module/misc/control.php
+++ b/module/misc/control.php
@@ -71,4 +71,16 @@ class misc extends control
         $this->view->browser = $browser;
         $this->display();
     }
+
+    /**
+     * Check model extension logic
+     * 
+     * @access public
+     * @return void
+     */
+    public function checkExtension()
+    {
+        echo $this->misc->hello();
+        echo $this->misc->hello2();
+    }
 }
diff --git a/module/misc/ext/model/class/test.class.php b/module/misc/ext/model/class/test.class.php
new file mode 100644
index 0000000000..ecbf5aed42
--- /dev/null
+++ b/module/misc/ext/model/class/test.class.php
@@ -0,0 +1,8 @@
+<?php
+class testMisc extends miscModel
+{
+    public function hello()
+    {
+        return parent::hello() . " from ext model<br />";
+    }
+}
diff --git a/module/misc/ext/model/ext.php b/module/misc/ext/model/ext.php
new file mode 100644
index 0000000000..aa2f873704
--- /dev/null
+++ b/module/misc/ext/model/ext.php
@@ -0,0 +1,6 @@
+<?php
+public function hello2()
+{
+    echo $this->loadExtension('test')->hello();    // Load testMisc class from test.class.php in ext/model/class.
+    return $this->testMisc->hello();               // After loading, can use $this->testMisc to call it.
+}
diff --git a/module/misc/ext/model/hook/hello.test.php b/module/misc/ext/model/hook/hello.test.php
new file mode 100644
index 0000000000..0fa90b6223
--- /dev/null
+++ b/module/misc/ext/model/hook/hello.test.php
@@ -0,0 +1,2 @@
+<?php
+echo "start from hello.test.php <br>";
diff --git a/module/misc/ext/model/hook/hello.test2.php b/module/misc/ext/model/hook/hello.test2.php
new file mode 100644
index 0000000000..d8ec452f50
--- /dev/null
+++ b/module/misc/ext/model/hook/hello.test2.php
@@ -0,0 +1,2 @@
+<?php
+echo 'start from hellp.test2.php<br>';
diff --git a/module/misc/ext/model/hook/hello2.start.php b/module/misc/ext/model/hook/hello2.start.php
new file mode 100644
index 0000000000..1d1ecce293
--- /dev/null
+++ b/module/misc/ext/model/hook/hello2.start.php
@@ -0,0 +1,2 @@
+<?php
+echo 'start from hello2.start.php<br>';
diff --git a/module/misc/model.php b/module/misc/model.php
index 5989c648aa..8ac651eb2d 100644
--- a/module/misc/model.php
+++ b/module/misc/model.php
@@ -13,4 +13,8 @@
 <?php
 class miscModel extends model
 {
+    public function hello()
+    {
+        return 'hello world from hello()<br />';
+    }
 }