diff --git a/AIStudio.Wpf.DiagramApp/ViewModels/MindViewModel.cs b/AIStudio.Wpf.DiagramApp/ViewModels/MindViewModel.cs
index e89e198..9556dfb 100644
--- a/AIStudio.Wpf.DiagramApp/ViewModels/MindViewModel.cs
+++ b/AIStudio.Wpf.DiagramApp/ViewModels/MindViewModel.cs
@@ -37,7 +37,7 @@ namespace AIStudio.Wpf.Flowchart
         }
 
 
-        private MindType _mindType = Mind.MindType.Directory;
+        private MindType _mindType = Mind.MindType.FishBone;
         public MindType MindType
         {
             get
@@ -55,10 +55,10 @@ namespace AIStudio.Wpf.Flowchart
             base.Init();
 
             MindNode level1node = new MindNode(DiagramViewModel, Mind.NodeLevel.Level1, MindType) { Text = "思维导图" };
-            level1node.Left = 220;
-            level1node.Top = 15;
+            //level1node.Left = 220;
+            //level1node.Top = 15;
             DiagramViewModel.DirectAddItemCommand.Execute(level1node);
-            //DiagramViewModel.CenterMoveCommand.Execute(level1node);
+            DiagramViewModel.CenterMoveCommand.Execute(level1node);
 
             MindNode level2node1_1 = new MindNode(DiagramViewModel, Mind.NodeLevel.Level2, MindType) { Text = "分支主题1" };
             level1node.AddChild(level2node1_1);
diff --git a/AIStudio.Wpf.Mind/Helpers/FishBoneLayout.cs b/AIStudio.Wpf.Mind/Helpers/FishBoneLayout.cs
index 260bbf7..2b50fce 100644
--- a/AIStudio.Wpf.Mind/Helpers/FishBoneLayout.cs
+++ b/AIStudio.Wpf.Mind/Helpers/FishBoneLayout.cs
@@ -14,6 +14,10 @@ namespace AIStudio.Wpf.Mind.Helpers
     {
         public void Appearance(MindNode mindNode)
         {
+            if (mindNode == null) return;
+
+            mindNode.GetLevel1Node().LayoutUpdating = true;
+
             switch (mindNode.NodeLevel)
             {
                 case NodeLevel.Level1:
@@ -31,6 +35,7 @@ namespace AIStudio.Wpf.Mind.Helpers
                         mindNode.ColorViewModel.LineColor.Color = Color.FromRgb(0x73, 0xa1, 0xbf);
                         mindNode.FontViewModel.FontColor = Colors.White;
                         mindNode.FontViewModel.FontSize = 15;
+                        mindNode.Spacing = new SizeBase(50, 15);
                         mindNode.ShapeViewModel.SinkMarker.PathStyle = ArrowPathStyle.None;
                         mindNode.ShapeViewModel.SinkMarker.SizeStyle = ArrowSizeStyle.VerySmall;
 
@@ -84,6 +89,8 @@ namespace AIStudio.Wpf.Mind.Helpers
                         break;
                     }
             }
+
+            mindNode.GetLevel1Node().LayoutUpdating = false;
         }
 
 
@@ -108,17 +115,23 @@ namespace AIStudio.Wpf.Mind.Helpers
                 if (mindNode.NodeLevel == NodeLevel.Level1)
                 {
                     var tops = mindNode.Children.Where((p, index) => index % 2 == 0).ToList();
-                    tops.ForEach(p => p.ConnectorOrientation = ConnectorOrientation.Top);
+                    tops.ForEach(p => p.ConnectorOrientation = ConnectorOrientation.BottomLeft);
                     var topsizes = tops.Select(p => MeasureOverride(p, mindNode.IsExpanded && isExpanded)).ToArray();
                     var bottoms = mindNode.Children.Where((p, index) => index % 2 == 1).ToList();
-                    bottoms.ForEach(p => p.ConnectorOrientation = ConnectorOrientation.Bottom);
+                    bottoms.ForEach(p => p.ConnectorOrientation = ConnectorOrientation.TopLeft);
                     var bottomsizes = bottoms.Select(p => MeasureOverride(p, mindNode.IsExpanded && isExpanded)).ToArray();
-                    sizewithSpacing = new SizeBase(sizewithSpacing.Width + Math.Max(topsizes.Sum(p => p.Width), bottomsizes.Sum(p => p.Width)),  sizewithSpacing.Height + topsizes.Max(p => p.Height) + bottomsizes.Max(p => p.Height));
+                    sizewithSpacing = new SizeBase(sizewithSpacing.Width + Math.Max(topsizes.Sum(p => p.Width), bottomsizes.Sum(p => p.Width)), sizewithSpacing.Height + topsizes.Max(p => p.Height) + bottomsizes.Max(p => p.Height));
                 }
-                else
+                else if (mindNode.NodeLevel == NodeLevel.Level2)
                 {
                     var childrensizes = mindNode.Children.Select(p => MeasureOverride(p, mindNode.IsExpanded && isExpanded)).ToArray();
-                    sizewithSpacing = new SizeBase(sizewithSpacing.Width + childrensizes.Sum(p => p.Width), sizewithSpacing.Height + childrensizes.Sum(p => p.Height));
+                    var lastchildsize = childrensizes.LastOrDefault();
+                    sizewithSpacing = new SizeBase(sizewithSpacing.Width + childrensizes.Sum(p => p.Width) + lastchildsize.Height / 2 - lastchildsize.Width, sizewithSpacing.Height + childrensizes.Sum(p => p.Height));
+                }
+                else if (mindNode.NodeLevel == NodeLevel.Level3)
+                {
+                    var childrensizes = mindNode.Children.Select(p => MeasureOverride(p, mindNode.IsExpanded && isExpanded)).ToArray();
+                    sizewithSpacing = new SizeBase(Math.Max(sizewithSpacing.Width, sizewithSpacing.Width * 0.5 + childrensizes.Max(p => p.Width)), sizewithSpacing.Height + childrensizes.Sum(p => p.Height));
                 }
             }
             mindNode.DesiredSize = isExpanded ? sizewithSpacing : new SizeBase(0, 0);
@@ -129,26 +142,56 @@ namespace AIStudio.Wpf.Mind.Helpers
 
         public void ArrangeOverride(MindNode mindNode)
         {
-            double left = mindNode.MiddlePosition.X - Math.Max(mindNode.DesiredSize.Width, mindNode.Children.Sum(p => p.DesiredSize.Width)) / 2;
-            double top = mindNode.MiddlePosition.Y + mindNode.ItemHeight / 2 + mindNode.Spacing.Height;
-            if (mindNode.Children?.Count > 0)
+            if (mindNode.NodeLevel == NodeLevel.Level1)
             {
-                foreach (var child in mindNode.Children)
+                var tops = mindNode.Children.Where(p => p.ConnectorOrientation == ConnectorOrientation.BottomLeft).ToList();
+                double topleft = mindNode.MiddlePosition.X + mindNode.ItemWidth / 2 + mindNode.Spacing.Width;
+                double toptop = mindNode.MiddlePosition.Y - mindNode.ItemHeight / 2 - mindNode.Spacing.Height;
+
+                if (mindNode.Children?.Count > 0)
                 {
-                    child.Left = left + child.DesiredSize.Width / 2 - child.ItemWidth / 2 + child.Offset.X;
-                    child.Top = top + child.Spacing.Height + child.Offset.Y;
-                    child.DesiredPosition = child.Position;
-                    left += child.DesiredSize.Width;
+                    foreach (var child in tops)
+                    {
+                        child.Left = topleft + child.Spacing.Width + child.Offset.X;
+                        child.Top = toptop - child.ItemHeight - child.Spacing.Height + child.Offset.Y;
+                        child.DesiredPosition = child.Position;
+                        topleft += child.DesiredSize.Width;
 
-                    ArrangeOverride(child);
+                        ArrangeOverride(child);
 
-                    var connect = mindNode.Root?.Items.OfType<ConnectionViewModel>().FirstOrDefault(p => p.SourceConnectorInfo?.DataItem == mindNode && p.SinkConnectorInfoFully?.DataItem == child);
-                    connect?.SetSourcePort(mindNode.BottomConnector);
-                    connect?.SetSinkPort(child.TopConnector);
-                    connect.Visible = child.Visible;
+                        //var connect = mindNode.Root?.Items.OfType<ConnectionViewModel>().FirstOrDefault(p => p.SourceConnectorInfo?.DataItem == mindNode && p.SinkConnectorInfoFully?.DataItem == child);
+                        //connect?.SetSourcePort(mindNode.BottomConnector);
+                        //connect?.SetSinkPort(child.TopConnector);
+                        //connect.Visible = child.Visible;
+                    }
+                }
+
+                var bottoms = mindNode.Children.Where(p => p.ConnectorOrientation == ConnectorOrientation.TopLeft).ToList();
+                double bottomleft = mindNode.MiddlePosition.X + mindNode.ItemWidth / 2 + mindNode.Spacing.Width;
+                double bottomtop = mindNode.MiddlePosition.Y + mindNode.ItemHeight / 2 + mindNode.Spacing.Height;
+
+                if (mindNode.Children?.Count > 0)
+                {
+                    foreach (var child in bottoms)
+                    {
+                        child.Left = bottomleft + child.Spacing.Width + child.Offset.X;
+                        child.Top = bottomtop + child.ItemHeight + child.Spacing.Height + child.Offset.Y;
+                        child.DesiredPosition = child.Position;
+                        bottomleft += child.DesiredSize.Width;
+
+                        ArrangeOverride(child);
+
+                        //var connect = mindNode.Root?.Items.OfType<ConnectionViewModel>().FirstOrDefault(p => p.SourceConnectorInfo?.DataItem == mindNode && p.SinkConnectorInfoFully?.DataItem == child);
+                        //connect?.SetSourcePort(mindNode.BottomConnector);
+                        //connect?.SetSinkPort(child.TopConnector);
+                        //connect.Visible = child.Visible;
+                    }
                 }
             }
+            else if (mindNode.NodeLevel == NodeLevel.Level2)
+            {
 
+            }
         }
     }