diff --git a/src/main/java/com/telpo/dipperposition/handler/NettyServerHandler.java b/src/main/java/com/telpo/dipperposition/handler/NettyServerHandler.java
index eca0d3e..3d062e5 100644
--- a/src/main/java/com/telpo/dipperposition/handler/NettyServerHandler.java
+++ b/src/main/java/com/telpo/dipperposition/handler/NettyServerHandler.java
@@ -154,7 +154,7 @@ public class NettyServerHandler extends ChannelInboundHandlerAdapter {
         log.info(channelAns);
         if (channelAns != null) {
             buf = Unpooled.buffer(channelAns.getBytes().length);
-            buf.writeBytes(channelAns.getBytes("GBK"));
+            buf.writeBytes(channelAns.getBytes("UTF-8"));
             ctx.writeAndFlush(buf);
         }
     }
diff --git a/src/main/java/com/telpo/dipperposition/service/impl/DipperAstPosAsyncTaskServiceImpl.java b/src/main/java/com/telpo/dipperposition/service/impl/DipperAstPosAsyncTaskServiceImpl.java
index 56c3ea6..f6b4d80 100644
--- a/src/main/java/com/telpo/dipperposition/service/impl/DipperAstPosAsyncTaskServiceImpl.java
+++ b/src/main/java/com/telpo/dipperposition/service/impl/DipperAstPosAsyncTaskServiceImpl.java
@@ -210,14 +210,37 @@ public class DipperAstPosAsyncTaskServiceImpl implements IDipperAstPosAsyncTaskS
         //  00 2F 为校验和
 
         // astTimeCmd 组装
-        String astTimeCmd = "233E0401";
-        astTimeCmd += "1000";
-        astTimeCmd += HexConvert.encodeHEX(lanLongValue);
-        astTimeCmd += HexConvert.encodeHEX(altLongValue);
-        astTimeCmd += "70170000";
-        astTimeCmd += "A0860100";
-
-        return astTimeCmd + HexConvert.makeChecksum(astTimeCmd);
+        String astTimeCmd = "23 3E 04 01 ";
+        astTimeCmd += "10 00 ";
+        byte[] lanBytes = HexConvert.hexStringToBytes(HexConvert.encodeHEX(lanLongValue).toUpperCase());
+
+        byte[] altBytes = HexConvert.hexStringToBytes(HexConvert.encodeHEX(altLongValue).toUpperCase());
+
+        StringBuffer lanBuf = new StringBuffer();
+        for(int i=0; i<lanBytes.length; i++) {
+            String s = Integer.toHexString(lanBytes[i] & 0xff);
+            if (s.length() < 2) {
+                lanBuf.append('0');
+            }
+            lanBuf.append(s + " ");
+        }
+
+        StringBuffer altBuf = new StringBuffer();
+        for(int i=0; i<altBytes.length; i++) {
+            String s = Integer.toHexString(altBytes[i] & 0xff);
+            if (s.length() < 2) {
+                altBuf.append('0');
+            }
+            altBuf.append(s + " ");
+        }
+
+        astTimeCmd += lanBuf;
+        astTimeCmd += altBuf;
+        astTimeCmd += "70 17 00 00 ";
+        astTimeCmd += "A0 86 01 00 ";
+
+        String checkSum = HexConvert.makeChecksum(astTimeCmd).toUpperCase();
+        return astTimeCmd + checkSum.substring(0,1) + " " + checkSum.substring(2,3);
 
     }
 }
diff --git a/src/main/java/com/telpo/dipperposition/service/impl/DipperAstTimeAsyncTaskServiceImpl.java b/src/main/java/com/telpo/dipperposition/service/impl/DipperAstTimeAsyncTaskServiceImpl.java
index c5bf044..bacbe26 100644
--- a/src/main/java/com/telpo/dipperposition/service/impl/DipperAstTimeAsyncTaskServiceImpl.java
+++ b/src/main/java/com/telpo/dipperposition/service/impl/DipperAstTimeAsyncTaskServiceImpl.java
@@ -43,24 +43,25 @@ public class DipperAstTimeAsyncTaskServiceImpl implements IDipperAstTimeAsyncTas
         // 00 5E D0 B2 表示 3 秒的时间精度（十六进制 B2 D0 5E 00 转为十进制为3000000000，乘以比 例因子 10-9就是 3 秒 小端模式00 5E D0 B2）
         // 00 2F 为校验和
         // TODO astTimeCmd 组装
-        String astTimeCmd = "233E0402";
-        astTimeCmd += "1000";
-        astTimeCmd += "20E1";
+        String astTimeCmd = "23 3E 04 02 ";
+        astTimeCmd += "10 00 ";
+        astTimeCmd += "20 E1 ";
         LocalDateTime now = LocalDateTime.now();
         int year = now.getYear();
         int month = now.getMonthValue();
         int day = now.getDayOfMonth();
         String hexYearString = Integer.toHexString(year);
         hexYearString = "0" + hexYearString;
-        astTimeCmd += hexYearString.substring(2,2) + hexYearString.substring(0,2);
+        astTimeCmd += hexYearString.substring(2,3).toUpperCase() + " " + hexYearString.substring(0,1).toUpperCase() + " ";
         String hexMonthString = Integer.toHexString(month);
         hexMonthString = "0" + hexMonthString;
-        astTimeCmd += hexMonthString;
+        astTimeCmd += hexMonthString.toUpperCase() + " ";
+
         String hexDayString = Integer.toHexString(day);
         if (day < 16) {
             hexDayString = "0" + hexDayString;
         }
-        astTimeCmd += hexDayString;
+        astTimeCmd += hexDayString.toUpperCase() + " ";
 
         int hour = now.getHour();
         int minitor = now.getMinute();
@@ -69,23 +70,24 @@ public class DipperAstTimeAsyncTaskServiceImpl implements IDipperAstTimeAsyncTas
         if (hour < 16) {
             hexHourString = "0" + hexHourString;
         }
-        astTimeCmd += hexHourString;
+        astTimeCmd += hexHourString.toUpperCase() + " ";
         String hexMinitorString = Integer.toHexString(minitor);
         if (minitor < 16) {
             hexMinitorString = "0" + hexMinitorString;
         }
-        astTimeCmd += hexMinitorString;
+        astTimeCmd += hexMinitorString.toUpperCase() + " ";
         String hexSecondString = Integer.toHexString(second);
         if (second < 16) {
             hexSecondString = "0" + hexSecondString;
         }
-        astTimeCmd += hexSecondString;
-        astTimeCmd += "0000000000";
-        astTimeCmd += "005ED0B2";
+        astTimeCmd += hexSecondString.toUpperCase() + " ";
+        astTimeCmd += "00 00 00 00 00 ";
+        astTimeCmd += "00 5E D0 B2 ";
 
-        String hexIn = astTimeCmd + HexConvert.makeChecksum(astTimeCmd);
-        log.info("DipperAstTimeAsyncTaskServiceImpl 返回时间：" + hexIn);
+        String checkSum = HexConvert.makeChecksum(astTimeCmd).toUpperCase();
+        return astTimeCmd + checkSum.substring(0,1) + " " + checkSum.substring(2,3);
+        //String hexIn = astTimeCmd + HexConvert.makeChecksum(astTimeCmd);
+        //log.info("DipperAstTimeAsyncTaskServiceImpl 返回时间：" + hexIn);
 
-        return hexIn;
     }
 }