diff --git a/OTP/App.config b/OTP/App.config
index 90c1718..7279368 100644
--- a/OTP/App.config
+++ b/OTP/App.config
@@ -19,4 +19,12 @@
       <add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".NET Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
     <remove invariant="System.Data.SQLite" /><add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" /></DbProviderFactories>
   </system.data>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
 </configuration>
\ No newline at end of file
diff --git a/OTP/Form1.Designer.cs b/OTP/Form1.Designer.cs
index 14bb647..7bcef7b 100644
--- a/OTP/Form1.Designer.cs
+++ b/OTP/Form1.Designer.cs
@@ -41,10 +41,12 @@
             // 
             // listBox1
             // 
+            this.listBox1.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
             this.listBox1.FormattingEnabled = true;
+            this.listBox1.ItemHeight = 20;
             this.listBox1.Location = new System.Drawing.Point(42, 38);
             this.listBox1.Name = "listBox1";
-            this.listBox1.Size = new System.Drawing.Size(473, 368);
+            this.listBox1.Size = new System.Drawing.Size(473, 364);
             this.listBox1.TabIndex = 0;
             this.listBox1.SelectedIndexChanged += new System.EventHandler(this.listBox1_SelectedIndexChanged);
             // 
@@ -63,9 +65,9 @@
             // button1
             // 
             this.button1.Enabled = false;
-            this.button1.Location = new System.Drawing.Point(556, 294);
+            this.button1.Location = new System.Drawing.Point(549, 294);
             this.button1.Name = "button1";
-            this.button1.Size = new System.Drawing.Size(85, 23);
+            this.button1.Size = new System.Drawing.Size(92, 23);
             this.button1.TabIndex = 3;
             this.button1.Text = "Generate";
             this.button1.UseVisualStyleBackColor = true;
@@ -76,7 +78,7 @@
             this.button2.Enabled = false;
             this.button2.Location = new System.Drawing.Point(647, 294);
             this.button2.Name = "button2";
-            this.button2.Size = new System.Drawing.Size(85, 111);
+            this.button2.Size = new System.Drawing.Size(99, 111);
             this.button2.TabIndex = 3;
             this.button2.Text = "Copy";
             this.button2.UseVisualStyleBackColor = true;
@@ -130,9 +132,9 @@
             // 
             // button3
             // 
-            this.button3.Location = new System.Drawing.Point(556, 323);
+            this.button3.Location = new System.Drawing.Point(549, 323);
             this.button3.Name = "button3";
-            this.button3.Size = new System.Drawing.Size(85, 23);
+            this.button3.Size = new System.Drawing.Size(92, 23);
             this.button3.TabIndex = 7;
             this.button3.Text = "Manage";
             this.button3.UseVisualStyleBackColor = true;
@@ -140,21 +142,23 @@
             // 
             // button4
             // 
-            this.button4.Location = new System.Drawing.Point(556, 352);
+            this.button4.Location = new System.Drawing.Point(549, 352);
             this.button4.Name = "button4";
-            this.button4.Size = new System.Drawing.Size(85, 23);
+            this.button4.Size = new System.Drawing.Size(92, 23);
             this.button4.TabIndex = 8;
             this.button4.Text = "Refresh";
             this.button4.UseVisualStyleBackColor = true;
+            this.button4.Click += new System.EventHandler(this.button4_Click);
             // 
             // button5
             // 
-            this.button5.Location = new System.Drawing.Point(556, 382);
+            this.button5.Location = new System.Drawing.Point(549, 382);
             this.button5.Name = "button5";
-            this.button5.Size = new System.Drawing.Size(85, 23);
+            this.button5.Size = new System.Drawing.Size(92, 23);
             this.button5.TabIndex = 9;
-            this.button5.Text = "About";
+            this.button5.Text = "Troubleshooting";
             this.button5.UseVisualStyleBackColor = true;
+            this.button5.Click += new System.EventHandler(this.button5_Click);
             // 
             // Form1
             // 
@@ -170,8 +174,9 @@
             this.Controls.Add(this.label1);
             this.Controls.Add(this.listBox1);
             this.Controls.Add(this.circularProgressBar1);
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
             this.Name = "Form1";
-            this.Text = "Main Window";
+            this.Text = "TOTP";
             this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);
             this.Load += new System.EventHandler(this.Form1_Load);
             this.VisibleChanged += new System.EventHandler(this.Form1_VisibleChanged);
diff --git a/OTP/Form1.cs b/OTP/Form1.cs
index 85c608c..962ab1c 100644
--- a/OTP/Form1.cs
+++ b/OTP/Form1.cs
@@ -225,5 +225,15 @@ namespace OTP
             }
         }
 
+        private void button4_Click(object sender, EventArgs e)
+        {
+            LoadTitlesToListBox();
+        }
+
+        private void button5_Click(object sender, EventArgs e)
+        {
+            Form4 form4 = new Form4();
+            form4.Show();
+        }
     }
 }
diff --git a/OTP/Form2.Designer.cs b/OTP/Form2.Designer.cs
index 615c1f1..e6e5f0e 100644
--- a/OTP/Form2.Designer.cs
+++ b/OTP/Form2.Designer.cs
@@ -116,6 +116,7 @@
             this.Controls.Add(this.panel1);
             this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
             this.Name = "Form2";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
             this.Text = "Data Manage";
             this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form2_FormClosing);
             this.panel1.ResumeLayout(false);
diff --git a/OTP/Form4.Designer.cs b/OTP/Form4.Designer.cs
new file mode 100644
index 0000000..954cc7f
--- /dev/null
+++ b/OTP/Form4.Designer.cs
@@ -0,0 +1,118 @@
+namespace OTP
+{
+    partial class Form4
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.label2 = new System.Windows.Forms.Label();
+            this.label3 = new System.Windows.Forms.Label();
+            this.label1 = new System.Windows.Forms.Label();
+            this.label4 = new System.Windows.Forms.Label();
+            this.SuspendLayout();
+            // 
+            // label2
+            // 
+            this.label2.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
+            | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
+            this.label2.AutoSize = true;
+            this.label2.Font = new System.Drawing.Font("Microsoft Sans Serif", 36F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.label2.Location = new System.Drawing.Point(12, 64);
+            this.label2.Name = "label2";
+            this.label2.Size = new System.Drawing.Size(152, 55);
+            this.label2.TabIndex = 1;
+            this.label2.Text = "label2";
+            this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
+            // 
+            // label3
+            // 
+            this.label3.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
+            | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
+            this.label3.AutoSize = true;
+            this.label3.Font = new System.Drawing.Font("Microsoft Sans Serif", 36F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.label3.Location = new System.Drawing.Point(12, 119);
+            this.label3.Name = "label3";
+            this.label3.Size = new System.Drawing.Size(216, 55);
+            this.label3.TabIndex = 2;
+            this.label3.Text = "网络时间";
+            this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
+            // 
+            // label1
+            // 
+            this.label1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
+            | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
+            this.label1.AutoSize = true;
+            this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 36F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.label1.Location = new System.Drawing.Point(12, 9);
+            this.label1.Name = "label1";
+            this.label1.Size = new System.Drawing.Size(360, 55);
+            this.label1.TabIndex = 3;
+            this.label1.Text = "计算机本地时间";
+            this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
+            // 
+            // label4
+            // 
+            this.label4.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
+            | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
+            this.label4.AutoSize = true;
+            this.label4.Font = new System.Drawing.Font("Microsoft Sans Serif", 36F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.label4.Location = new System.Drawing.Point(12, 174);
+            this.label4.Name = "label4";
+            this.label4.Size = new System.Drawing.Size(152, 55);
+            this.label4.TabIndex = 4;
+            this.label4.Text = "label4";
+            this.label4.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
+            // 
+            // Form4
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(705, 242);
+            this.Controls.Add(this.label2);
+            this.Controls.Add(this.label3);
+            this.Controls.Add(this.label1);
+            this.Controls.Add(this.label4);
+            this.Name = "Form4";
+            this.Text = "Troubleshooting";
+            this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form4_FormClosing);
+            this.Load += new System.EventHandler(this.Form4_Load);
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Label label2;
+        private System.Windows.Forms.Label label3;
+        private System.Windows.Forms.Label label1;
+        private System.Windows.Forms.Label label4;
+    }
+}
\ No newline at end of file
diff --git a/OTP/Form4.cs b/OTP/Form4.cs
new file mode 100644
index 0000000..308d0cf
--- /dev/null
+++ b/OTP/Form4.cs
@@ -0,0 +1,89 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using GuerrillaNtp;
+using static System.Windows.Forms.VisualStyles.VisualStyleElement.TaskbarClock;
+
+namespace OTP
+{
+    public partial class Form4 : Form
+    {
+        private NtpClient ntpClient;
+        private NtpClock clock;
+        private Timer timer;
+
+        public Form4()
+        {
+            InitializeComponent();
+            ntpClient = new NtpClient("time.pool.aliyun.com");
+
+            // Create and configure the timer
+            timer = new Timer();
+            timer.Interval = 1000; // 1 second interval
+            timer.Tick += Timer_Tick;
+        }
+
+        private async void Form4_Load(object sender, EventArgs e)
+        {
+            try
+            {
+                // Display local time
+                UpdateLocalTimeLabel();
+
+                // Query time from NTP server
+                clock = await ntpClient.QueryAsync();
+
+                // Display network time from NTP server
+                UpdateNetworkTimeLabel();
+
+                // Start the timer to update network time periodically
+                timer.Start();
+            }
+            catch (Exception ex)
+            {
+                // Handle any exceptions that might occur during NTP query
+                label4.Text = "NTP Error: " + ex.Message;
+            }
+        }
+
+        private void Timer_Tick(object sender, EventArgs e)
+        {
+            // Update the time label
+            UpdateLocalTimeLabel();
+            UpdateNetworkTimeLabel();
+        }
+        private void UpdateLocalTimeLabel()
+        {
+            DateTime localTime = DateTime.Now;
+            label2.Text = localTime.ToString();
+        }
+        private void UpdateNetworkTimeLabel()
+        {
+            if (clock != null)
+            {
+                DateTimeOffset networkTime = clock.UtcNow;
+
+                // Convert network time to user's local time zone
+                TimeZoneInfo localTimeZone = TimeZoneInfo.Local;
+                DateTimeOffset localTime = TimeZoneInfo.ConvertTime(networkTime, localTimeZone);
+
+                label4.Text = localTime.ToString();
+            }
+        }
+
+
+        // Form4 closing event
+        private void Form4_FormClosing(object sender, FormClosingEventArgs e)
+        {
+            // Stop the timer when the form is closing
+            timer.Stop();
+        }
+    }
+}
+
diff --git a/OTP/Form4.resx b/OTP/Form4.resx
new file mode 100644
index 0000000..1af7de1
--- /dev/null
+++ b/OTP/Form4.resx
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file
diff --git a/OTP/OTP.csproj b/OTP/OTP.csproj
index dae8ba7..917115b 100644
--- a/OTP/OTP.csproj
+++ b/OTP/OTP.csproj
@@ -54,6 +54,9 @@
     <Reference Include="EntityFramework.SqlServer, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, processorArchitecture=MSIL">
       <HintPath>..\packages\EntityFramework.6.4.4\lib\net45\EntityFramework.SqlServer.dll</HintPath>
     </Reference>
+    <Reference Include="GuerrillaNtp, Version=3.1.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\GuerrillaNtp.3.1.0\lib\netstandard2.0\GuerrillaNtp.dll</HintPath>
+    </Reference>
     <Reference Include="Otp.NET, Version=1.3.0.0, Culture=neutral, PublicKeyToken=38a48df817e173a6, processorArchitecture=MSIL">
       <HintPath>..\packages\Otp.NET.1.3.0\lib\net45\Otp.NET.dll</HintPath>
     </Reference>
@@ -70,6 +73,9 @@
       <HintPath>..\packages\SharpDX.DXGI.4.2.0\lib\net45\SharpDX.DXGI.dll</HintPath>
     </Reference>
     <Reference Include="System" />
+    <Reference Include="System.Buffers, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Buffers.4.5.1\lib\net461\System.Buffers.dll</HintPath>
+    </Reference>
     <Reference Include="System.ComponentModel.DataAnnotations" />
     <Reference Include="System.Core" />
     <Reference Include="System.Data.SQLite, Version=1.0.118.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139, processorArchitecture=MSIL">
@@ -89,6 +95,16 @@
       <Private>True</Private>
       <Private>True</Private>
     </Reference>
+    <Reference Include="System.Memory, Version=4.0.1.2, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Memory.4.5.5\lib\net461\System.Memory.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Numerics.Vectors.4.5.0\lib\net46\System.Numerics.Vectors.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.6.0.0\lib\net461\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
@@ -127,6 +143,12 @@
     <Compile Include="Form3.Designer.cs">
       <DependentUpon>Form3.cs</DependentUpon>
     </Compile>
+    <Compile Include="Form4.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="Form4.Designer.cs">
+      <DependentUpon>Form4.cs</DependentUpon>
+    </Compile>
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <EmbeddedResource Include="Form1.resx">
@@ -138,6 +160,9 @@
     <EmbeddedResource Include="Form3.resx">
       <DependentUpon>Form3.cs</DependentUpon>
     </EmbeddedResource>
+    <EmbeddedResource Include="Form4.resx">
+      <DependentUpon>Form4.cs</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="Properties\Resources.resx">
       <Generator>ResXFileCodeGenerator</Generator>
       <LastGenOutput>Resources.Designer.cs</LastGenOutput>
@@ -148,7 +173,6 @@
       <DependentUpon>Resources.resx</DependentUpon>
     </Compile>
     <EmbeddedResource Include="empty_key.db" />
-    <None Include="key.db" />
     <None Include="packages.config" />
     <None Include="Properties\Settings.settings">
       <Generator>SettingsSingleFileGenerator</Generator>
diff --git a/OTP/packages.config b/OTP/packages.config
index 1bf25ae..5f23a0c 100644
--- a/OTP/packages.config
+++ b/OTP/packages.config
@@ -5,18 +5,23 @@
   <package id="AForge.Video.DirectShow" version="2.2.5" targetFramework="net481" />
   <package id="CircularProgressBar" version="2.8.0.16" targetFramework="net481" />
   <package id="EntityFramework" version="6.4.4" targetFramework="net481" />
+  <package id="GuerrillaNtp" version="3.1.0" targetFramework="net481" />
   <package id="Otp.NET" version="1.3.0" targetFramework="net481" />
   <package id="ScreenCapturer" version="3.0.1" targetFramework="net481" />
   <package id="SharpDX" version="4.2.0" targetFramework="net481" />
   <package id="SharpDX.Direct3D11" version="4.2.0" targetFramework="net481" />
   <package id="SharpDX.DXGI" version="4.2.0" targetFramework="net481" />
   <package id="Stub.System.Data.SQLite.Core.NetFramework" version="1.0.118.0" targetFramework="net481" />
+  <package id="System.Buffers" version="4.5.1" targetFramework="net481" />
   <package id="System.Data.SQLite" version="1.0.118.0" targetFramework="net481" />
   <package id="System.Data.SQLite.Core" version="1.0.118.0" targetFramework="net481" />
   <package id="System.Data.SQLite.EF6" version="1.0.118.0" targetFramework="net481" />
   <package id="System.Data.SQLite.Linq" version="1.0.118.0" targetFramework="net481" />
   <package id="System.Drawing.Common" version="7.0.0" targetFramework="net481" />
   <package id="System.IO" version="4.3.0" targetFramework="net481" />
+  <package id="System.Memory" version="4.5.5" targetFramework="net481" />
+  <package id="System.Numerics.Vectors" version="4.5.0" targetFramework="net481" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="6.0.0" targetFramework="net481" />
   <package id="WinFormAnimation" version="1.6.0.4" targetFramework="net481" />
   <package id="ZXing.Net" version="0.16.9" targetFramework="net481" />
 </packages>
\ No newline at end of file