diff --git a/src/JT808.Protocol.Test/Internal/JT808MsgSNDistributedTest.cs b/src/JT808.Protocol.Test/Internal/JT808MsgSNDistributedTest.cs
index d02dac2..7f6b216 100644
--- a/src/JT808.Protocol.Test/Internal/JT808MsgSNDistributedTest.cs
+++ b/src/JT808.Protocol.Test/Internal/JT808MsgSNDistributedTest.cs
@@ -14,9 +14,9 @@ namespace JT808.Protocol.Test.Internal
         {
             IJT808MsgSNDistributed JT808MsgSNDistributed = new DefaultMsgSNDistributedImpl();
             var a=JT808MsgSNDistributed.Increment("1234");
-            Assert.Equal(1, a);
+            Assert.Equal(0, a);
             var a1 = JT808MsgSNDistributed.Increment("1234");
-            Assert.Equal(2, a1);
+            Assert.Equal(1, a1);
         }
     }
 }
diff --git a/src/JT808.Protocol.Test/MessageBody/JT808_0x0100Test.cs b/src/JT808.Protocol.Test/MessageBody/JT808_0x0100Test.cs
index 573c683..d398fc2 100644
--- a/src/JT808.Protocol.Test/MessageBody/JT808_0x0100Test.cs
+++ b/src/JT808.Protocol.Test/MessageBody/JT808_0x0100Test.cs
@@ -126,7 +126,7 @@ namespace JT808.Protocol.Test.MessageBody
             });
             var data = JT808Serializer.Serialize(package);
             var hex = data.ToHexString();
-            Assert.Equal("7E0100405401000000000222222222220001000000004B6F696B653030320000004B6F696B65303032000000000000000000000000000000000000000000004B6F696B653030320000000000000000000000000000000000000000000002D4C1413132333436207E".ToUpper(), hex);
+            Assert.Equal("7E0100405401000000000222222222220000000000004B6F696B653030320000004B6F696B65303032000000000000000000000000000000000000000000004B6F696B653030320000000000000000000000000000000000000000000002D4C1413132333436217E".ToUpper(), hex);
         }
 
         [Fact]
diff --git a/src/JT808.Protocol.Test/MessageBody/JT808_0x8800Test.cs b/src/JT808.Protocol.Test/MessageBody/JT808_0x8800Test.cs
index 9941d37..d373a96 100644
--- a/src/JT808.Protocol.Test/MessageBody/JT808_0x8800Test.cs
+++ b/src/JT808.Protocol.Test/MessageBody/JT808_0x8800Test.cs
@@ -26,7 +26,7 @@ namespace JT808.Protocol.Test.MessageBody
 
             };
             string hex = JT808Serializer.Serialize(jT808Package).ToHexString();
-            Assert.Equal("7E8800000900012345678900010000008102010203048E7E", hex);
+            Assert.Equal("7E8800000900012345678900000000008102010203048F7E", hex);
         }
 
         [Fact]
@@ -64,7 +64,7 @@ namespace JT808.Protocol.Test.MessageBody
 
             };
             string hex = JT808Serializer.Serialize(jT808Package, JT808Version.JTT2013).ToHexString();
-            Assert.Equal("7E88000004000123456789000100000081857E", hex);
+            Assert.Equal("7E88000004000123456789000000000081847E", hex);
         }
 
         [Fact]
@@ -103,7 +103,7 @@ namespace JT808.Protocol.Test.MessageBody
 
             };
             string hex = JT808Serializer.Serialize(jT808Package,JT808Version.JTT2011).ToHexString();
-            Assert.Equal("7E8800000500012345678900010000008100847E", hex);
+            Assert.Equal("7E8800000500012345678900000000008100857E", hex);
         }
 
         [Fact]