diff --git a/GFramework.Godot/coroutine/Timing.cs b/GFramework.Godot/coroutine/Timing.cs
index 3b850c2..7e22f49 100644
--- a/GFramework.Godot/coroutine/Timing.cs
+++ b/GFramework.Godot/coroutine/Timing.cs
@@ -2,6 +2,7 @@
 using GFramework.Core.Abstractions.coroutine;
 using GFramework.Core.coroutine;
 using GFramework.Core.coroutine.instructions;
+using GFramework.Godot.extensions;
 using Godot;
 
 namespace GFramework.Godot.coroutine;
@@ -62,16 +63,17 @@ public partial class Timing : Node
 
             var tree = (SceneTree)Engine.GetMainLoop();
             _instance = tree.Root.GetNodeOrNull<Timing>(nameof(Timing));
-
-            if (_instance == null)
+            if (_instance != null)
             {
-                _instance = new Timing
-                {
-                    Name = nameof(Timing)
-                };
-                tree.Root.AddChild(_instance);
+                return _instance;
             }
 
+            _instance = new Timing
+            {
+                Name = nameof(Timing)
+            };
+            tree.Root.WaitUntilReady(() => { tree.Root.AddChild(_instance); });
+
             return _instance;
         }
     }
diff --git a/GFramework.Godot/extensions/NodeExtensions.cs b/GFramework.Godot/extensions/NodeExtensions.cs
index b45a82f..ac93cd8 100644
--- a/GFramework.Godot/extensions/NodeExtensions.cs
+++ b/GFramework.Godot/extensions/NodeExtensions.cs
@@ -49,11 +49,40 @@ public static class NodeExtensions
     ///     如果节点尚未进入场景树，则等待 ready 信号。
     ///     如果已经在场景树中，则立刻返回。
     /// </summary>
+    /// <param name="node">要等待其准备就绪的节点</param>
+    /// <returns>表示异步操作的任务</returns>
     public static async Task WaitUntilReady(this Node node)
     {
         if (!node.IsInsideTree()) await node.ToSignal(node, Node.SignalName.Ready);
     }
 
+    /// <summary>
+    ///     如果节点尚未进入场景树，则等待 ready 信号后执行回调函数。
+    ///     如果已经在场景树中，则立即执行回调函数。
+    /// </summary>
+    /// <param name="node">要等待其准备就绪的节点</param>
+    /// <param name="callback">节点准备就绪后要执行的回调函数</param>
+    public static void WaitUntilReady(this Node node, Action callback)
+    {
+        // 检查节点是否已经在场景树中
+        if (node.IsInsideTree())
+        {
+            callback();
+            return;
+        }
+
+        _ = WaitAsync();
+        return;
+
+        // 异步等待节点准备就绪并执行回调
+        async Task WaitAsync()
+        {
+            await node.ToSignal(node, Node.SignalName.Ready);
+            callback();
+        }
+    }
+
+
     /// <summary>
     ///     检查节点是否有效：
     ///     1. 非 null