diff --git a/src/main/java/com/kimgo/wepush/service/HeartBeatService.java b/src/main/java/com/kimgo/wepush/service/HeartBeatService.java
index 8957eed..2c7664e 100644
--- a/src/main/java/com/kimgo/wepush/service/HeartBeatService.java
+++ b/src/main/java/com/kimgo/wepush/service/HeartBeatService.java
@@ -52,7 +52,7 @@ public class HeartBeatService {
 
         UpdateWrapper<DeviceInfoDAO> updateWrapper = new UpdateWrapper<>();
         updateWrapper.eq("sn", deviceInfo.getSN());
-        updateWrapper.set("last_online_time", currentTimeMillis); // 设置新的 accessToken
+        updateWrapper.set("last_online_time", currentTimeMillis);
 
         int result = deviceInfoDAOMapper.update(null, updateWrapper);
         if (result > 0) {
@@ -86,11 +86,11 @@ public class HeartBeatService {
         try {
             DeviceInfoDAO deviceInfoDAO = deviceInfoDAOMapper.selectOne(queryWrapper);
             if (deviceInfoDAO != null) {
-                logger.info("Data is queried in the database based on the device id");
+                logger.info("Data is queried in the database based on the SN");
                 return deviceInfoDAO;
             }
         } catch (Exception e) {
-            logger.error("Error querying device info by android ID", e);
+            logger.error("Error querying device info by SN", e);
         }
         return null;
     }