diff --git a/Assets/PerfectWorld/Scripts/UI/Dialogs/AUIDialog.cs b/Assets/PerfectWorld/Scripts/UI/Dialogs/AUIDialog.cs
index e1a564978d..2490475da9 100644
--- a/Assets/PerfectWorld/Scripts/UI/Dialogs/AUIDialog.cs
+++ b/Assets/PerfectWorld/Scripts/UI/Dialogs/AUIDialog.cs
@@ -355,5 +355,10 @@ namespace BrewMonster.UI
         {
             m_bUpdateRenderTarget = false;
         }
+
+        public virtual void CloseDialogue()
+        {
+            CECUIManager.Instance.HideCurrentUIInStack();
+        }
     }
 }
diff --git a/Assets/PerfectWorld/Scripts/UI/Dialogs/DlgInstall.cs b/Assets/PerfectWorld/Scripts/UI/Dialogs/DlgInstall.cs
index 7d3f70bb4e..c5169a8b3e 100644
--- a/Assets/PerfectWorld/Scripts/UI/Dialogs/DlgInstall.cs
+++ b/Assets/PerfectWorld/Scripts/UI/Dialogs/DlgInstall.cs
@@ -589,7 +589,7 @@ namespace BrewMonster
             var host = GetHostPlayer();
             host?.EndNPCService();
             host?.GetPack(InventoryConst.IVTRTYPE_PACK).UnfreezeAllItems();
-            gameObject.SetActive(false);
+            CloseDialogue();
         }
 
 
@@ -654,5 +654,10 @@ namespace BrewMonster
                 }
             }
         }
+
+        public void ShowTest(bool isStack)
+        {
+            CECUIManager.Instance.ShowUI("Win_Disenchase",isStack);
+        }
     }
 }
\ No newline at end of file
diff --git a/Assets/PerfectWorld/Scripts/UI/Dialogs/DlgNPC.cs b/Assets/PerfectWorld/Scripts/UI/Dialogs/DlgNPC.cs
index 2c791c6861..0ca4a7456b 100644
--- a/Assets/PerfectWorld/Scripts/UI/Dialogs/DlgNPC.cs
+++ b/Assets/PerfectWorld/Scripts/UI/Dialogs/DlgNPC.cs
@@ -3411,8 +3411,9 @@ namespace BrewMonster.UI
                 {
                     uint npcID = pCurNPCEssence.Value.id;
                     
-                    var dlgInstall =GetGameUIMan().GetDialog("Win_Enchase");
-                    dlgInstall.Show(true);
+                    // var dlgInstall =GetGameUIMan().GetDialog("Win_Enchase");
+                    // dlgInstall.Show(true);
+                    CECUIManager.Instance.ShowUI("Win_Enchase",true);
                 }
                 //pShow1 = m_pAUIManager.GetDialog("Win_Enchase");
                 //pShow2 = m_pAUIManager.GetDialog("Win_Inventory");
diff --git a/Assets/Scripts/CECUIManager.cs b/Assets/Scripts/CECUIManager.cs
index 04de9b1ca7..6ce2c282b8 100644
--- a/Assets/Scripts/CECUIManager.cs
+++ b/Assets/Scripts/CECUIManager.cs
@@ -12,7 +12,10 @@ public class CECUIManager : MonoSingleton<CECUIManager>
     [SerializeField] private TMP_Text _fpsText;
     [SerializeField] private List<GameObject> uiPrefabs; // drag các prefab UI vào đây
 
-    private readonly Dictionary<System.Type, GameObject> _spawnedUIs = new();
+    private readonly Dictionary<Type, GameObject> _spawnedUIs = new();
+
+    /// <summary>Stack of dialog names (front = index 0 = top / currently on top).</summary>
+    private readonly List<string> _uiStack = new();
 
     [SerializeField] private HUDNPC npsUI;
 
@@ -135,19 +138,138 @@ public class CECUIManager : MonoSingleton<CECUIManager>
     }
 
     /// <summary>
-    /// Show UI by name of component ("DlgTask", "EC_InventoryUI")
+    /// Show UI by name of component ("DlgTask", "EC_InventoryUI"). When isStack is true, pushes the dialog onto the UI stack (brings to front and tracks for Pop).
     /// </summary>
-    /// <param name="componentName">name of component ("DlgTask", "EC_InventoryUI")</param>
-    public void ShowUI(string componentName)
+    /// <param name="componentName">Name of component ("DlgTask", "EC_InventoryUI")</param>
+    /// <param name="isStack">If true, push onto stack (show + SetAsLastSibling + track); if false, just show.</param>
+    /// <param name="hideCurrentUI">just hide current ui- not pop</param>
+    public void ShowUI(string componentName, bool isStack = true, bool hideCurrentUI = true)
     {
         if (string.IsNullOrEmpty(componentName) || canvasDlg == null)
         {
             if (canvasDlg == null) Debug.LogError("canvasDlg chưa được gán");
             return;
         }
+        if (hideCurrentUI)
+        {
+            var currentDialogue = GetCurrentDialog();
+            if(currentDialogue !=null)
+            {
+                currentDialogue.Show(false);
+            }
+        }
 
-        GetInGameUIMan().GetDialog(componentName).Show(true);
+        if (isStack)
+        {
+            Push(componentName);
+            return;
+        }
+
+        var dialogue = GetInGameUIMan().GetDialog(componentName);
+        dialogue.Show(true);
+        dialogue.transform.SetAsLastSibling();
     }
+    public void HideCurrentUIInStack()
+    {
+        var currentDialogue = GetCurrentDialog();
+        Debug.Log(_uiStack.Count);
+        Pop();
+        Debug.Log(_uiStack.Count);
+        //show next one
+        currentDialogue = GetCurrentDialog();
+        if(currentDialogue !=null)
+        {
+            currentDialogue.Show(true);
+        }
+    }
+
+    /// <summary>
+    /// Push a dialog onto the UI stack: show it, add to front of stack, and SetAsLastSibling so it draws on top. If already in stack, moves it to front.
+    /// </summary>
+    private void Push(string componentName)
+    {
+        if (string.IsNullOrEmpty(componentName) || canvasDlg == null) return;
+
+        _uiStack.Remove(componentName);
+
+        var dlg = GetInGameUIMan().GetDialog(componentName);
+        if (dlg == null) return;
+
+        dlg.Show(true);
+        _uiStack.Insert(0, componentName);
+        dlg.transform.SetAsLastSibling();
+    }
+
+    /// <summary>
+    /// Pop the top dialog off the stack: hide it and bring the new top (if any) to front. Returns true if something was popped.
+    /// </summary>
+    private bool Pop()
+    {
+        if (_uiStack.Count == 0) return false;
+
+        string top = _uiStack[0];
+        _uiStack.RemoveAt(0);
+
+        var dlg = GetInGameUIMan().GetDialog(top);
+        if (dlg != null)
+            dlg.Show(false);
+
+        if (_uiStack.Count > 0)
+        {
+            var newTop = GetInGameUIMan().GetDialog(_uiStack[0]);
+            if (newTop != null)
+                newTop.transform.SetAsLastSibling();
+        }
+
+        return true;
+    }
+
+    /// <summary>Returns the name of the dialog currently on top of the stack, or null if stack is empty.</summary>
+    public string GetCurrentUI()
+    {
+        if (_uiStack.Count == 0) return null;
+        return _uiStack[0];
+    }
+
+    /// <summary>Returns the dialog instance currently on top of the stack, or null if stack is empty.</summary>
+    public AUIDialog GetCurrentDialog()
+    {
+        var name = GetCurrentUI();
+        if (name == null) return null;
+        return GetInGameUIMan().GetDialog(name);
+    }
+
+    /// <summary>Returns the number of dialogs in the stack (0 when empty).</summary>
+    public int GetStackCount() => _uiStack.Count;
+
+    /// <summary>Returns true if the given dialog name is in the stack.</summary>
+    public bool IsInStack(string componentName)
+    {
+        return !string.IsNullOrEmpty(componentName) && _uiStack.Contains(componentName);
+    }
+
+    /// <summary>Returns the dialog name at the given index (0 = top) without removing. Returns null if index is out of range.</summary>
+    public string PeekStack(int index = 0)
+    {
+        if (index < 0 || index >= _uiStack.Count) return null;
+        return _uiStack[index];
+    }
+
+    /// <summary>Clears the entire stack. If hideAll is true, hides every dialog in the stack before clearing.</summary>
+    public void ClearStack(bool hideAll = true)
+    {
+        if (hideAll)
+        {
+            var gui = GetInGameUIMan();
+            foreach (string name in _uiStack)
+            {
+                var dlg = gui?.GetDialog(name);
+                if (dlg != null) dlg.Show(false);
+            }
+        }
+        _uiStack.Clear();
+    }
+
     public CDlgMessageBox ShowMessageBox(MessageBoxData messageBoxData)
     {
         var msgBox = GetInGameUIMan().GetDialog("DlgMessageBox") as CDlgMessageBox;