diff --git a/Engine/Application/Application.c b/Engine/Application/Application.c
index 4cb2100b..031c1344 100644
--- a/Engine/Application/Application.c
+++ b/Engine/Application/Application.c
@@ -74,10 +74,10 @@ static void Loop()
     float deltaSeconds = (float) ((now.tv_nsec - last.tv_nsec) * 0.000000001 + (now.tv_sec - last.tv_sec));
     last               =  now;
 
+    APhysicsWorld->Update(deltaSeconds);
+    ATween       ->Update(deltaSeconds);
     AScheduler   ->Update(deltaSeconds);
     ACoroutine   ->Update(deltaSeconds);
-    ATween       ->Update(deltaSeconds);
-    APhysicsWorld->Update(deltaSeconds);
     AAudio       ->Update(deltaSeconds);
 
     // root update
diff --git a/Engine/Graphics/Draw/Drawable.h b/Engine/Graphics/Draw/Drawable.h
index 15c3cd92..9a5c33d2 100644
--- a/Engine/Graphics/Draw/Drawable.h
+++ b/Engine/Graphics/Draw/Drawable.h
@@ -280,6 +280,9 @@ struct  Drawable
       * Custom draw for preparing rendering data.
       * called by ADrawable's Draw, do not use any openGL command,
       * and can check any state change.
+      *
+      * if called in Scheduler or Coroutine may have draw order problem,
+      * because the draw oder common controlled by Component.
       */
      void (*Draw)  (Drawable* drawable);