diff --git a/Plane.FormationCreator/Formation/CopterManager.cs b/Plane.FormationCreator/Formation/CopterManager.cs
index 7d14c1a..ea79b06 100644
--- a/Plane.FormationCreator/Formation/CopterManager.cs
+++ b/Plane.FormationCreator/Formation/CopterManager.cs
@@ -25,7 +25,7 @@ namespace Plane.FormationCreator.Formation
     public class CopterCollection : ObservableCollection<ICopter>
     {
         //软件过期时间---过期将无法添加飞机，并自动退出
-        public static DateTime Expire_App = DateTime.Parse("2021-06-01");
+        public static DateTime Expire_App = DateTime.Parse("2022-06-10");
         //超级用户过期时间--过期将无法使用内置超级用户登录
         public static DateTime Expire_SuperUser = Expire_App;
         //允许飞行的飞机数量
diff --git a/Plane.FormationCreator/MainWindow.xaml.cs b/Plane.FormationCreator/MainWindow.xaml.cs
index 7771201..126e46e 100644
--- a/Plane.FormationCreator/MainWindow.xaml.cs
+++ b/Plane.FormationCreator/MainWindow.xaml.cs
@@ -138,7 +138,9 @@ namespace Plane.FormationCreator
             {
 
                 case Key.LeftCtrl:
-                   {
+                case Key.RightCtrl:
+                case Key.LeftAlt:
+                    {
                         var copters = _copterManager.AcceptingControlCopters;
                         Shiftkeydown = true;
                         _copterManager.shiftkeydown = true;
@@ -422,6 +424,8 @@ namespace Plane.FormationCreator
             switch (e.Key)
             {
                 case Key.LeftCtrl:
+                case Key.RightCtrl:
+                case Key.LeftAlt:
                     {
                         Shiftkeydown = false;
                         _copterManager.shiftkeydown = false;
diff --git a/Plane.FormationCreator/ViewModels/ControlPanelViewModel.cs b/Plane.FormationCreator/ViewModels/ControlPanelViewModel.cs
index 55e7607..413bce0 100644
--- a/Plane.FormationCreator/ViewModels/ControlPanelViewModel.cs
+++ b/Plane.FormationCreator/ViewModels/ControlPanelViewModel.cs
@@ -166,7 +166,7 @@ namespace Plane.FormationCreator.ViewModels
                         {
                             if ((!showch) &&(minVol>0.00) && (kv.Value<=minVol))
                             {
-                                Message.Show(string.Format("以下飞机电压低于[{0}V]更换值：", minVol));
+                                Message.Show(string.Format("以下飞机电压低于[{0}V，单节{1:F2}]", minVol, minVol/4));
                                 showch = true;
                             }
                             Message.Show(string.Format("{0} --> 5秒平均电压：{1:F2},单节{2:F2}", kv.Key, kv.Value, kv.Value/4));