diff --git a/src/main/java/com/genersoft/iot/vmp/jt1078/proc/request/J0100.java b/src/main/java/com/genersoft/iot/vmp/jt1078/proc/request/J0100.java
index 8be3abc4a..bbfe34646 100644
--- a/src/main/java/com/genersoft/iot/vmp/jt1078/proc/request/J0100.java
+++ b/src/main/java/com/genersoft/iot/vmp/jt1078/proc/request/J0100.java
@@ -61,9 +61,17 @@ public class J0100 extends Re {
             buf.readBytes(bytes5);
             device.setMakerId(new String(bytes5).trim());
 
-            byte[] bytes20 = new byte[20];
-            buf.readBytes(bytes20);
-            device.setModel(new String(bytes20).trim());
+
+            if (buf.readableBytes() < 29) {
+                // 按照2011解析
+                byte[] bytes8 = new byte[8];
+                buf.readBytes(bytes8);
+                device.setModel(new String(bytes8).trim());
+            }else {
+                byte[] bytes20 = new byte[20];
+                buf.readBytes(bytes20);
+                device.setModel(new String(bytes20).trim());
+            }
 
             byte[] bytes7 = new byte[7];
             buf.readBytes(bytes7);
diff --git a/src/main/java/com/genersoft/iot/vmp/jt1078/proc/request/J0200.java b/src/main/java/com/genersoft/iot/vmp/jt1078/proc/request/J0200.java
index f42054027..e783f9d4a 100644
--- a/src/main/java/com/genersoft/iot/vmp/jt1078/proc/request/J0200.java
+++ b/src/main/java/com/genersoft/iot/vmp/jt1078/proc/request/J0200.java
@@ -1,7 +1,8 @@
 package com.genersoft.iot.vmp.jt1078.proc.request;
 
 import com.genersoft.iot.vmp.jt1078.annotation.MsgId;
-import com.genersoft.iot.vmp.jt1078.bean.*;
+import com.genersoft.iot.vmp.jt1078.bean.JTPositionAdditionalInfo;
+import com.genersoft.iot.vmp.jt1078.bean.JTPositionBaseInfo;
 import com.genersoft.iot.vmp.jt1078.proc.Header;
 import com.genersoft.iot.vmp.jt1078.proc.response.J8001;
 import com.genersoft.iot.vmp.jt1078.proc.response.Rs;
@@ -9,8 +10,6 @@ import com.genersoft.iot.vmp.jt1078.service.Ijt1078Service;
 import com.genersoft.iot.vmp.jt1078.session.Session;
 import io.netty.buffer.ByteBuf;
 import lombok.extern.slf4j.Slf4j;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.context.ApplicationEvent;
 
 /**