diff --git a/common/src/main/java/io/wdd/common/beans/status/AgentSystemInfo.java b/common/src/main/java/io/wdd/common/beans/status/AgentSystemInfo.java
index dccf589..4eaccb6 100644
--- a/common/src/main/java/io/wdd/common/beans/status/AgentSystemInfo.java
+++ b/common/src/main/java/io/wdd/common/beans/status/AgentSystemInfo.java
@@ -40,7 +40,7 @@ public class AgentSystemInfo {
                                 ZoneId.of("UTC+8")
                         )
                 ))
-                .upTime(TimeUtils.toRelative(os.getSystemUptime()*1000))
+                .upTime(TimeUtils.toRelative(os.getSystemUptime()*1000, 3))
                 .build();
 
     }
diff --git a/common/src/main/java/io/wdd/common/utils/TimeUtils.java b/common/src/main/java/io/wdd/common/utils/TimeUtils.java
index 5bebdd7..dd3b037 100644
--- a/common/src/main/java/io/wdd/common/utils/TimeUtils.java
+++ b/common/src/main/java/io/wdd/common/utils/TimeUtils.java
@@ -35,6 +35,14 @@ public class TimeUtils {
     }
 
 
+    /**
+     * https://memorynotfound.com/calculate-relative-time-time-ago-java/
+     *
+     *  calculate relative time from now on
+     *   like 5 days, 3 hours, 16 minutes  level 3
+     *
+     * */
+
     private static final Map<String, Long> times = new HashMap<>(16);
 
     static {