diff --git a/src/JT809.Protocol/Formatters/JT809HeaderFormatter.cs b/src/JT809.Protocol/Formatters/JT809HeaderFormatter.cs
index b18233e..aea0357 100644
--- a/src/JT809.Protocol/Formatters/JT809HeaderFormatter.cs
+++ b/src/JT809.Protocol/Formatters/JT809HeaderFormatter.cs
@@ -15,15 +15,17 @@ namespace JT809.Protocol.Formatters
 
         public JT809Header Deserialize(ref JT809MessagePackReader reader, IJT809Config config)
         {
-            JT809Header jT809Header = new JT809Header();
-            jT809Header.MsgLength = reader.ReadUInt32();
-            jT809Header.MsgSN = reader.ReadUInt32();
-            jT809Header.BusinessType = reader.ReadUInt16();
-            jT809Header.MsgGNSSCENTERID = reader.ReadUInt32();
-            jT809Header.Version = new JT809Header_Version(reader.ReadArray(JT809Header_Version.FixedByteLength));
-            jT809Header.EncryptFlag = (JT809Header_Encrypt)reader.ReadByte();
-            jT809Header.EncryptKey = reader.ReadUInt32();
-            jT809Header.Time = reader.ReadUTCDateTime();
+            JT809Header jT809Header = new JT809Header
+            {
+                MsgLength = reader.ReadUInt32(),
+                MsgSN = reader.ReadUInt32(),
+                BusinessType = reader.ReadUInt16(),
+                MsgGNSSCENTERID = reader.ReadUInt32(),
+                Version = new JT809Header_Version(reader.ReadArray(JT809Header_Version.FixedByteLength)),
+                EncryptFlag = (JT809Header_Encrypt)reader.ReadByte(),
+                EncryptKey = reader.ReadUInt32(),
+                Time = reader.ReadUTCDateTime()
+            };
             return jT809Header;
         }
 
diff --git a/src/JT809.Protocol/Formatters/JT809HeaderPackageFormatter.cs b/src/JT809.Protocol/Formatters/JT809HeaderPackageFormatter.cs
index 3004c92..47391c1 100644
--- a/src/JT809.Protocol/Formatters/JT809HeaderPackageFormatter.cs
+++ b/src/JT809.Protocol/Formatters/JT809HeaderPackageFormatter.cs
@@ -19,12 +19,14 @@ namespace JT809.Protocol.Formatters
                 //  1.2. 验证校验码
                 if (!reader.CheckXorCodeVali)
                 {
-                    throw new JT809Exception(JT809ErrorCode.CRC16CheckInvalid, $"{reader.CalculateCheckXorCode.ToString()}!={reader.RealCheckXorCode.ToString()}");
+                    throw new JT809Exception(JT809ErrorCode.CRC16CheckInvalid, $"{reader.CalculateCheckXorCode}!={reader.RealCheckXorCode}");
                 }
             }
-            JT809HeaderPackage jT809Package = new JT809HeaderPackage();
-            // 2.读取起始头
-            jT809Package.BeginFlag = reader.ReadStart();
+            JT809HeaderPackage jT809Package = new JT809HeaderPackage
+            {
+                // 2.读取起始头
+                BeginFlag = reader.ReadStart()
+            };
             // 3.初始化消息头
             try
             {
@@ -32,7 +34,7 @@ namespace JT809.Protocol.Formatters
             }
             catch (Exception ex)
             {
-                throw new JT809Exception(JT809ErrorCode.HeaderParseError, $"offset>{reader.ReadCurrentRemainContentLength().ToString()}", ex);
+                throw new JT809Exception(JT809ErrorCode.HeaderParseError, $"offset>{reader.ReadCurrentRemainContentLength()}", ex);
             }
             // 5.数据体处理
             //  5.1 判断是否有数据体（总长度-固定长度）> 0
@@ -56,7 +58,7 @@ namespace JT809.Protocol.Formatters
                 }
                 catch (Exception ex)
                 {
-                    throw new JT809Exception(JT809ErrorCode.BodiesParseError, $"offset>{reader.ReadCurrentRemainContentLength().ToString()}", ex);
+                    throw new JT809Exception(JT809ErrorCode.BodiesParseError, $"offset>{reader.ReadCurrentRemainContentLength()}", ex);
                 }
             }
             jT809Package.CRCCode = reader.CalculateCheckXorCode;
diff --git a/src/JT809.Protocol/Formatters/JT809PackageFormatter.cs b/src/JT809.Protocol/Formatters/JT809PackageFormatter.cs
index 15a6e0b..01e91b8 100644
--- a/src/JT809.Protocol/Formatters/JT809PackageFormatter.cs
+++ b/src/JT809.Protocol/Formatters/JT809PackageFormatter.cs
@@ -23,12 +23,14 @@ namespace JT809.Protocol.Formatters
                 //  1.2. 验证校验码
                 if (!reader.CheckXorCodeVali)
                 {
-                    throw new JT809Exception(JT809ErrorCode.CRC16CheckInvalid, $"{reader.CalculateCheckXorCode.ToString()}!={reader.RealCheckXorCode.ToString()}");
+                    throw new JT809Exception(JT809ErrorCode.CRC16CheckInvalid, $"{reader.CalculateCheckXorCode}!={reader.RealCheckXorCode}");
                 }
             }
-            JT809Package jT809Package = new JT809Package();
-            // 2.读取起始头
-            jT809Package.BeginFlag = reader.ReadStart();
+            JT809Package jT809Package = new JT809Package
+            {
+                // 2.读取起始头
+                BeginFlag = reader.ReadStart()
+            };
             // 3.初始化消息头
             try
             {
@@ -36,7 +38,7 @@ namespace JT809.Protocol.Formatters
             }
             catch (Exception ex)
             {
-                throw new JT809Exception(JT809ErrorCode.HeaderParseError, $"offset>{reader.ReadCurrentRemainContentLength().ToString()}", ex);
+                throw new JT809Exception(JT809ErrorCode.HeaderParseError, $"offset>{reader.ReadCurrentRemainContentLength()}", ex);
             }
             // 5.数据体处理
             //  5.1 判断是否有数据体（总长度-固定长度）> 0
@@ -69,7 +71,7 @@ namespace JT809.Protocol.Formatters
                 }
                 catch (Exception ex)
                 {
-                    throw new JT809Exception(JT809ErrorCode.BodiesParseError, $"offset>{reader.ReadCurrentRemainContentLength().ToString()}", ex);
+                    throw new JT809Exception(JT809ErrorCode.BodiesParseError, $"offset>{reader.ReadCurrentRemainContentLength()}", ex);
                 }
             }
             jT809Package.CRCCode = reader.CalculateCheckXorCode;
@@ -98,6 +100,8 @@ namespace JT809.Protocol.Formatters
             writer.WriteByte((byte)value.Header.EncryptFlag);
             //  2.7.数据加密密钥
             writer.WriteUInt32(value.Header.EncryptKey);
+            // 2.8 发送消息时系统UTC时间
+            writer.WriteUTCDateTime(value.Header.Time);
             // 3.写入数据体
             //  3.1.记录当前开始位置
             int startIndex = writer.GetCurrentPosition();
diff --git a/src/JT809.Protocol/Formatters/MessageBodyFormatters/JT809_0x1001_Formatter.cs b/src/JT809.Protocol/Formatters/MessageBodyFormatters/JT809_0x1001_Formatter.cs
index d89c482..c637274 100644
--- a/src/JT809.Protocol/Formatters/MessageBodyFormatters/JT809_0x1001_Formatter.cs
+++ b/src/JT809.Protocol/Formatters/MessageBodyFormatters/JT809_0x1001_Formatter.cs
@@ -15,12 +15,14 @@ namespace JT809.Protocol.Formatters.MessageBodyFormatters
 
         public JT809_0x1001 Deserialize(ref JT809MessagePackReader reader, IJT809Config config)
         {
-            JT809_0x1001 jT809_0X1001 = new JT809_0x1001();
-            jT809_0X1001.UserId = reader.ReadUInt32();
-            jT809_0X1001.Password = reader.ReadString(8);
-            jT809_0X1001.MsgGNSSCENTERID = reader.ReadUInt32();
-            jT809_0X1001.DownLinkIP = reader.ReadString(32);
-            jT809_0X1001.DownLinkPort = reader.ReadUInt16();
+            JT809_0x1001 jT809_0X1001 = new JT809_0x1001
+            {
+                UserId = reader.ReadUInt32(),
+                Password = reader.ReadString(8),
+                MsgGNSSCENTERID = reader.ReadUInt32(),
+                DownLinkIP = reader.ReadString(32),
+                DownLinkPort = reader.ReadUInt16()
+            };
             return jT809_0X1001;
         }
 
diff --git a/src/JT809.Protocol/JT809.Protocol.csproj b/src/JT809.Protocol/JT809.Protocol.csproj
index 91a34f3..f59742d 100644
--- a/src/JT809.Protocol/JT809.Protocol.csproj
+++ b/src/JT809.Protocol/JT809.Protocol.csproj
@@ -14,7 +14,7 @@
     <PackageProjectUrl>https://github.com/SmallChi/JT809</PackageProjectUrl>
     <license>https://github.com/SmallChi/JT809/blob/master/LICENSE</license>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-    <Version>2.1.4</Version>
+    <Version>2.1.5</Version>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
   </PropertyGroup>
 
diff --git a/src/JT809.Protocol/JT809Header.cs b/src/JT809.Protocol/JT809Header.cs
index 944e594..9d8bbef 100644
--- a/src/JT809.Protocol/JT809Header.cs
+++ b/src/JT809.Protocol/JT809Header.cs
@@ -12,14 +12,14 @@ namespace JT809.Protocol
     {
         /// <summary>
         /// 固定为22个字节长度
-        /// <para>MSG LENGTH + MSG_SN + MSG_ID + MSG_GNSSCENTERID + VERSION_FLAG + ENCRYPT_FLAG + ENCRYPT_KEY</para>
-        /// <para>4 + 4 + 2 + 4 + 3 + 1 + 4 = 22</para>
+        /// <para>MSG LENGTH + MSG_SN + MSG_ID + MSG_GNSSCENTERID + VERSION_FLAG + ENCRYPT_FLAG + ENCRYPT_KEY + TIME</para>
+        /// <para>4 + 4 + 2 + 4 + 3 + 1 + 4 + 8 = 30</para>
         /// </summary>
-        public const int FixedByteLength = 22;
+        public const int FixedByteLength = 30;
         /// <summary>
         /// 数据长度(包括头标识、数据头、数据体和尾标识)
         /// <para>头标识 + 数据头 + 数据体 + 尾标识</para>
-        /// <para>1 + 22 + n + 1</para>
+        /// <para>1 + 30 + n + 1</para>
         /// </summary>
         public uint MsgLength { get; set; }
         /// <summary>