diff --git a/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/controller/HistoricalTrackController.java b/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/controller/HistoricalTrackController.java
index 29d792a..0a36b14 100644
--- a/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/controller/HistoricalTrackController.java
+++ b/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/controller/HistoricalTrackController.java
@@ -10,7 +10,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
-import java.util.Map;
 
 /**
  * @author Wenkang Tang
diff --git a/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/service/HistoricalTrackService.java b/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/service/HistoricalTrackService.java
index 576faaa..7ba88ff 100644
--- a/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/service/HistoricalTrackService.java
+++ b/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/service/HistoricalTrackService.java
@@ -1,12 +1,10 @@
 package com.dragon.vehicle.history.server.service;
 
-import com.dragon.common.core.domain.Result;
 import com.dragon.vehicle.history.common.domain.HistoryRecord;
 import com.dragon.vehicle.history.common.domain.VehicleData;
 import com.dragon.vehicle.history.common.domain.req.HistoryReq;
 
 import java.util.List;
-import java.util.Map;
 
 /**
  * @author Wenkang Tang
diff --git a/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/service/impl/CarServiceImpl.java b/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/service/impl/CarServiceImpl.java
index 5482569..6c686f7 100644
--- a/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/service/impl/CarServiceImpl.java
+++ b/vehicle-history-server/src/main/java/com/dragon/vehicle/history/server/service/impl/CarServiceImpl.java
@@ -19,12 +19,9 @@ import com.github.yulichang.wrapper.MPJLambdaWrapper;
 import lombok.extern.log4j.Log4j2;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.redis.core.RedisTemplate;
-import org.springframework.data.redis.core.ZSetOperations;
 import org.springframework.stereotype.Service;
 
 import java.util.List;
-import java.util.Objects;
-import java.util.Set;
 
 /**
  * @author Wenkang Tang