diff --git a/src/JT809.Protocol/JT809.Protocol.csproj b/src/JT809.Protocol/JT809.Protocol.csproj
index b8e5ad6..91a34f3 100644
--- a/src/JT809.Protocol/JT809.Protocol.csproj
+++ b/src/JT809.Protocol/JT809.Protocol.csproj
@@ -13,8 +13,8 @@
     <RepositoryUrl>https://github.com/SmallChi/JT809</RepositoryUrl>
     <PackageProjectUrl>https://github.com/SmallChi/JT809</PackageProjectUrl>
     <license>https://github.com/SmallChi/JT809/blob/master/LICENSE</license>
-    <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
-    <Version>2.1.3</Version>
+    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <Version>2.1.4</Version>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
   </PropertyGroup>
 
diff --git a/src/JT809.Protocol/JT809.Protocol.xml b/src/JT809.Protocol/JT809.Protocol.xml
index afe7f78..0b7440e 100644
--- a/src/JT809.Protocol/JT809.Protocol.xml
+++ b/src/JT809.Protocol/JT809.Protocol.xml
@@ -1087,6 +1087,11 @@
             数据加密的密匙，长度为 4 个字节
             </summary>
         </member>
+        <member name="P:JT809.Protocol.JT809Header.Time">
+            <summary>
+            发送消息时的系统UTC时间，长度为8个字节
+            </summary>
+        </member>
         <member name="T:JT809.Protocol.JT809HeaderPackage">
             <summary>
             JT809头部数据包
@@ -1167,6 +1172,11 @@
             8位
             </summary>
         </member>
+        <member name="P:JT809.Protocol.MessageBody.JT809_0x1001.MsgGNSSCENTERID">
+            <summary>
+            下级平台接入码
+            </summary>
+        </member>
         <member name="P:JT809.Protocol.MessageBody.JT809_0x1001.DownLinkIP">
             <summary>
             下级平台提供对应的从链路服务端 IP 地址