diff --git a/NodeController/LifeCycle/SerializableDataExtension.cs b/NodeController/LifeCycle/SerializableDataExtension.cs
index d91fbf1..cbee32f 100644
--- a/NodeController/LifeCycle/SerializableDataExtension.cs
+++ b/NodeController/LifeCycle/SerializableDataExtension.cs
@@ -97,8 +97,9 @@ public static void BeforeNetMangerAfterDeserialize() {
         public static void Load() {
             try {
                 Log.Called();
-                Log.Info(Helpers.WhatIsCurrentThread());
+                Log.Debug(Helpers.WhatIsCurrentThread());
                 Log.Debug("SimulationPaused=" + SimulationManager.instance.SimulationPaused);
+                Log.Debug($"[before] NetManger to update {NodeManager.CountUpdatingNodes()} nodes and {SegmentEndManager.CountUpdatingSegments()} segments.");
                 byte[] data = SerializableData.LoadData(DATA_ID);
                 if (data != null) {
                     LoadingVersion = 2;
@@ -114,7 +115,7 @@ public static void Load() {
                 NodeManager.ValidateAndHeal(true);
                 NodeManager.Instance.OnLoad();
                 SegmentEndManager.Instance.OnLoad();
-
+                Log.Info($"[after] NetManger to update {NodeManager.CountUpdatingNodes()} nodes and {SegmentEndManager.CountUpdatingSegments()} segments.");
                 NCLifeCycle.LoadingStage = NCLifeCycle.Stage.DataLoaded;
                 Log.Succeeded();
             } catch(Exception ex) { ex.Log(); }
diff --git a/NodeController/Manager/NodeManager.cs b/NodeController/Manager/NodeManager.cs
index 4ec9c34..7155861 100644
--- a/NodeController/Manager/NodeManager.cs
+++ b/NodeController/Manager/NodeManager.cs
@@ -235,5 +235,15 @@ public static void ValidateAndHeal(bool showError1) {
             Instance.Validate(m2, true);
             SegmentEndManager.Instance.Validate(m2, true);
         }
+
+        public static int CountUpdatingNodes() {
+            int ret = 0;
+            if (NetManager.instance.m_nodesUpdated) {
+                foreach (var block in NetManager.instance.m_updatedNodes) {
+                    ret += EnumBitMaskExtensions.CountOnes(block);
+                }
+            }
+            return ret;
+        }
     }
 }
diff --git a/NodeController/Manager/SegmentEndManager.cs b/NodeController/Manager/SegmentEndManager.cs
index 35c8102..1f0f6db 100644
--- a/NodeController/Manager/SegmentEndManager.cs
+++ b/NodeController/Manager/SegmentEndManager.cs
@@ -180,5 +180,14 @@ public void Heal() {
                     buffer[i] = null;
             }
         }
+        public static int CountUpdatingSegments() {
+            int ret = 0;
+            if (NetManager.instance.m_segmentsUpdated) {
+                foreach (var block in NetManager.instance.m_updatedSegments) {
+                    ret += EnumBitMaskExtensions.CountOnes(block);
+                }
+            }
+            return ret;
+        }
     }
 }
\ No newline at end of file
diff --git a/NodeController/Patches/NetManager/UpdateNodeSegmentPatch.cs b/NodeController/Patches/NetManager/UpdateNodeSegmentPatch.cs
new file mode 100644
index 0000000..34135a4
--- /dev/null
+++ b/NodeController/Patches/NetManager/UpdateNodeSegmentPatch.cs
@@ -0,0 +1,28 @@
+#if DEBUG
+namespace NodeController.Patches._NetManager; 
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using HarmonyLib;
+using KianCommons;
+using KianCommons.Patches;
+
+//[HarmonyPatch2(typeof(NetManager), typeof(UpdateNode))]
+static class UpdateNodePatch {
+    delegate void UpdateNode(ushort node, ushort fromSegment, int level);
+    static void Prefix(ushort node, ushort fromSegment, int level) {
+        Log.Called("node:" + node, "fromSegment:" + fromSegment, "level:" + level);
+        Log.Stack();
+    }
+}
+
+//[HarmonyPatch2(typeof(NetManager), typeof(UpdateSegment))]
+static class UpdateSegmentPatch {
+    delegate void UpdateSegment(ushort segment);
+    static void Prefix(ushort segment) {
+        Log.Called("segment:" + segment);
+        Log.Stack();
+    }
+}
+#endif
\ No newline at end of file