diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/message/D3F0SelfCheckMessage.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/message/D3F0SelfCheckMessage.java
index bfb51351..2cb5fff4 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/message/D3F0SelfCheckMessage.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/message/D3F0SelfCheckMessage.java
@@ -57,6 +57,17 @@ public class D3F0SelfCheckMessage extends BaseMessage {
                     " blVer:"+src.readUnsignedByte() +
                     " reboot:"+src.readUnsignedShort();
         }
+        if(src.readableBytes()>=8){
+            long lastActiveDate = src.readUnsignedInt();
+            long lastActiveTime = src.readUnsignedInt();
+            short year = (short) ((lastActiveDate>>16)&0xFF);
+            short month = (short) ((lastActiveDate>>8)&0xFF);
+            short day = (short) (lastActiveDate&0xFF);
+            byte hour = (byte) (lastActiveTime/3600);
+            byte munite = (byte) (lastActiveTime/60 - hour*60);
+            auxInfo = auxInfo + " last active time:"+
+                    year+"-"+month+"-"+day+" "+hour+":"+munite;
+        }
 
         // read 会移动 bytebuf 的指针，所以保存原始码流需要将此指针挑拨回开始处
         src.readerIndex(0);