diff --git a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/GroupNode.java b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/GroupNode.java
index 01ab1b6f..061d5811 100644
--- a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/GroupNode.java
+++ b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/GroupNode.java
@@ -4,6 +4,7 @@ import android.util.SparseArray;
 import android.view.ViewGroup;
 
 import com.github.penfeizhou.doric.DoricContext;
+import com.github.penfeizhou.doric.utils.DoricUtils;
 import com.github.pengfeizhou.jscore.JSArray;
 import com.github.pengfeizhou.jscore.JSObject;
 import com.github.pengfeizhou.jscore.JSValue;
@@ -79,5 +80,26 @@ public abstract class GroupNode<F extends ViewGroup> extends ViewNode<F> {
         return new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
     }
 
-    public abstract void blendChild(ViewNode viewNode, JSObject jsObject);
+    protected void blendChild(ViewNode viewNode, JSObject jsObject) {
+        JSValue jsValue = jsObject.getProperty("margin");
+        ViewGroup.LayoutParams layoutParams = viewNode.getLayoutParams();
+        if (jsValue.isObject() && layoutParams instanceof ViewGroup.MarginLayoutParams) {
+            JSValue topVal = jsValue.asObject().getProperty("top");
+            if (topVal.isNumber()) {
+                ((ViewGroup.MarginLayoutParams) layoutParams).topMargin = DoricUtils.dp2px(topVal.asNumber().toFloat());
+            }
+            JSValue leftVal = jsValue.asObject().getProperty("left");
+            if (leftVal.isNumber()) {
+                ((ViewGroup.MarginLayoutParams) layoutParams).leftMargin = DoricUtils.dp2px(leftVal.asNumber().toFloat());
+            }
+            JSValue rightVal = jsValue.asObject().getProperty("right");
+            if (rightVal.isNumber()) {
+                ((ViewGroup.MarginLayoutParams) layoutParams).rightMargin = DoricUtils.dp2px(rightVal.asNumber().toFloat());
+            }
+            JSValue bottomVal = jsValue.asObject().getProperty("bottom");
+            if (bottomVal.isNumber()) {
+                ((ViewGroup.MarginLayoutParams) layoutParams).bottomMargin = DoricUtils.dp2px(bottomVal.asNumber().toFloat());
+            }
+        }
+    }
 }
diff --git a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/HLayoutNode.java b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/HLayoutNode.java
index b5ae2cbe..0db3ff2d 100644
--- a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/HLayoutNode.java
+++ b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/HLayoutNode.java
@@ -18,7 +18,7 @@ public class HLayoutNode extends LinearNode {
     }
 
     @Override
-    public LinearLayout build(JSObject jsObject) {
+    protected LinearLayout build(JSObject jsObject) {
         LinearLayout linearLayout = super.build(jsObject);
         linearLayout.setOrientation(LinearLayout.HORIZONTAL);
         return linearLayout;
diff --git a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/ImageNode.java b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/ImageNode.java
index ef758a34..7ab221d8 100644
--- a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/ImageNode.java
+++ b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/ImageNode.java
@@ -18,7 +18,7 @@ public class ImageNode extends ViewNode<ImageView> {
     }
 
     @Override
-    public ImageView build(JSObject jsObject) {
+    protected ImageView build(JSObject jsObject) {
         return null;
     }
 }
diff --git a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/LinearNode.java b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/LinearNode.java
index 2cb0d857..e13ff0b2 100644
--- a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/LinearNode.java
+++ b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/LinearNode.java
@@ -20,11 +20,16 @@ public class LinearNode extends GroupNode<LinearLayout> {
     }
 
     @Override
-    public void blendChild(ViewNode viewNode, JSObject layoutConfig) {
+    protected void blendChild(ViewNode viewNode, JSObject layoutConfig) {
+        super.blendChild(viewNode, layoutConfig);
         JSValue jsValue = layoutConfig.getProperty("alignment");
         if (jsValue.isNumber()) {
             ((LinearLayout.LayoutParams) viewNode.getLayoutParams()).gravity = jsValue.asNumber().toInt();
         }
+        JSValue weight = layoutConfig.getProperty("weight");
+        if (weight.isNumber()) {
+            ((LinearLayout.LayoutParams) viewNode.getLayoutParams()).weight = weight.asNumber().toInt();
+        }
     }
 
     @Override
@@ -33,7 +38,7 @@ public class LinearNode extends GroupNode<LinearLayout> {
     }
 
     @Override
-    public LinearLayout build(JSObject jsObject) {
+    protected LinearLayout build(JSObject jsObject) {
         return new LinearLayout(getContext());
     }
 
diff --git a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/StackNode.java b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/StackNode.java
index a4b0516b..7b2436de 100644
--- a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/StackNode.java
+++ b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/StackNode.java
@@ -20,7 +20,8 @@ public class StackNode extends GroupNode<FrameLayout> {
     }
 
     @Override
-    public void blendChild(ViewNode viewNode, JSObject jsObject) {
+    protected void blendChild(ViewNode viewNode, JSObject jsObject) {
+        super.blendChild(viewNode, jsObject);
         JSValue jsValue = jsObject.getProperty("alignment");
         if (jsValue.isNumber()) {
             ((FrameLayout.LayoutParams) viewNode.getLayoutParams()).gravity = jsValue.asNumber().toInt();
@@ -28,7 +29,7 @@ public class StackNode extends GroupNode<FrameLayout> {
     }
 
     @Override
-    public FrameLayout build(JSObject jsObject) {
+    protected FrameLayout build(JSObject jsObject) {
         return new FrameLayout(getContext());
     }
 
diff --git a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/TextNode.java b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/TextNode.java
index 62b623e2..3197edbe 100644
--- a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/TextNode.java
+++ b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/TextNode.java
@@ -21,7 +21,7 @@ public class TextNode extends ViewNode<TextView> {
     }
 
     @Override
-    public TextView build(JSObject jsObject) {
+    protected TextView build(JSObject jsObject) {
         return new TextView(getContext());
     }
 
diff --git a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/VLayoutNode.java b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/VLayoutNode.java
index bb5d8704..2b5d4939 100644
--- a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/VLayoutNode.java
+++ b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/VLayoutNode.java
@@ -18,7 +18,7 @@ public class VLayoutNode extends LinearNode {
     }
 
     @Override
-    public LinearLayout build(JSObject jsObject) {
+    protected LinearLayout build(JSObject jsObject) {
         LinearLayout linearLayout = super.build(jsObject);
         linearLayout.setOrientation(LinearLayout.VERTICAL);
         return linearLayout;
diff --git a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/ViewNode.java b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/ViewNode.java
index 9bf8960c..84643e3b 100644
--- a/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/ViewNode.java
+++ b/Android/doric/src/main/java/com/github/penfeizhou/doric/shader/ViewNode.java
@@ -41,7 +41,7 @@ public abstract class ViewNode<T extends View> extends DoricComponent {
         return getDoricContext().getContext();
     }
 
-    public abstract T build(JSObject jsObject);
+    protected abstract T build(JSObject jsObject);
 
     void blend(JSObject jsObject, ViewGroup.LayoutParams layoutParams) {
         mLayoutParams = layoutParams;
diff --git a/js-framework/demo.ts b/js-framework/demo.ts
index 2f56af94..4fb29bec 100644
--- a/js-framework/demo.ts
+++ b/js-framework/demo.ts
@@ -1,4 +1,4 @@
-import { ViewHolder, VMPanel, View, ViewModel, WRAP_CONTENT, Gravity, Mutable, NativeCall, Text, Color, VLayout, Panel, log, logw, loge, Group, Stack, } from "./index"
+import { StackConfig, ViewHolder, VMPanel, View, ViewModel, WRAP_CONTENT, Gravity, Mutable, NativeCall, Text, Color, VLayout, Panel, log, logw, loge, Group, Stack, } from "./index"
 
 interface CountModel {
     count: number
@@ -45,7 +45,6 @@ class CounterVM extends ViewModel<CountModel, CounterView> {
 }
 
 
-@Entry
 class MyPage extends VMPanel<CountModel, CounterView>{
 
     getVMClass() {
@@ -72,4 +71,49 @@ class MyPage extends VMPanel<CountModel, CounterView>{
         logw("Hello.HEGO")
         loge("Hello.HEGO")
     }
+}
+
+
+
+
+class Snake {
+
+}
+
+class SnakeView extends ViewHolder {
+
+    build(root: Group): void {
+        root.bgColor = Color.parse('#000000')
+        const title = new Text
+        title.text = "Snake"
+        title.textSize = 20
+        title.textColor = Color.parse("#ffffff")
+        title.layoutConfig = {
+            alignment: new Gravity().centerX().top(),
+            margin: {
+                top: 20
+            }
+        } as StackConfig
+        root.addChild(title)
+    }
+}
+
+class SnakeVM extends ViewModel<Snake, SnakeView>{
+    binding(v: SnakeView, model: Snake) {
+
+    }
+}
+
+@Entry
+class SnakePanel extends VMPanel<Snake, SnakeView>{
+    getVMClass() {
+        return SnakeVM
+    }
+    getModel() {
+        return new Snake
+    }
+
+    getViewHolder() {
+        return new SnakeView
+    }
 }
\ No newline at end of file
diff --git a/js-framework/src/vm/mvvm.ts b/js-framework/src/vm/mvvm.ts
index 1a7c8654..d0e2f2e2 100644
--- a/js-framework/src/vm/mvvm.ts
+++ b/js-framework/src/vm/mvvm.ts
@@ -65,7 +65,7 @@ export abstract class ViewModel<M extends Object, V extends ViewHolder> {
     build(root: Group) {
         this.viewHolder.build(root)
         this.bind((data: M) => {
-            this.binding(this.viewHolder, this.model)
+            this.binding(this.viewHolder, data)
         })
     }