diff --git a/app/src/main/java/com/ttstd/dialer/bean/req/SnLocationReq.java b/app/src/main/java/com/ttstd/dialer/bean/req/SnLocationReq.java
index 0a6ba3a..90bf582 100644
--- a/app/src/main/java/com/ttstd/dialer/bean/req/SnLocationReq.java
+++ b/app/src/main/java/com/ttstd/dialer/bean/req/SnLocationReq.java
@@ -5,7 +5,6 @@ import com.google.gson.annotations.SerializedName;
 import com.ttstd.dialer.manager.MapManager;
 
 import java.io.Serializable;
-import java.time.LocalDateTime;
 
 /**
  * 设备定位信息请求模型
@@ -61,9 +60,6 @@ public class SnLocationReq implements Serializable {
     @SerializedName("mapError")
     private String mapError;
 
-    @SerializedName("lastSuccessfulTime")
-    private LocalDateTime lastSuccessfulTime;
-
     public SnLocationReq() {
     }
 
@@ -213,12 +209,4 @@ public class SnLocationReq implements Serializable {
     public void setMapError(String mapError) {
         this.mapError = mapError;
     }
-
-    public LocalDateTime getLastSuccessfulTime() {
-        return lastSuccessfulTime;
-    }
-
-    public void setLastSuccessfulTime(LocalDateTime lastSuccessfulTime) {
-        this.lastSuccessfulTime = lastSuccessfulTime;
-    }
 }
diff --git a/app/src/main/java/com/ttstd/dialer/manager/MapManager.java b/app/src/main/java/com/ttstd/dialer/manager/MapManager.java
index 905f63f..f46d6f1 100644
--- a/app/src/main/java/com/ttstd/dialer/manager/MapManager.java
+++ b/app/src/main/java/com/ttstd/dialer/manager/MapManager.java
@@ -271,16 +271,25 @@ public class MapManager {
         WeatherManager.getInstance().setAdCode(bdLocation.getAdCode());
 
         SnLocationReq snLocation = new SnLocationReq(bdLocation);
+        // 记录本次定位成功时间由服务端在接收上报时统一写入，移动端不传（避免 LocalDateTime 序列化格式冲突）
+        snLocation.setMapError("-");
 
         LiveEventBus.get(CommonConfig.LOCATION_CHANGED_KEY)
                 .post(snLocation);
     }
 
     /**
-     * 存储定位错误信息
+     * 存储定位错误信息并上报失败原因
+     * 构造一份仅包含错误信息的定位上报，使网页端能展示失败原因，而非一直停留在旧数据。
      */
     private void saveLocationError(String errorMsg) {
         mMMKV.encode("MapError", errorMsg);
+
+        SnLocationReq snLocation = new SnLocationReq();
+        snLocation.setMapError(errorMsg);
+
+        LiveEventBus.get(CommonConfig.LOCATION_CHANGED_KEY)
+                .post(snLocation);
     }
 
     // 百度定位回调
diff --git a/app/src/main/java/com/ttstd/dialer/service/main/MainServiceModel.java b/app/src/main/java/com/ttstd/dialer/service/main/MainServiceModel.java
index 6c63764..94f91ef 100644
--- a/app/src/main/java/com/ttstd/dialer/service/main/MainServiceModel.java
+++ b/app/src/main/java/com/ttstd/dialer/service/main/MainServiceModel.java
@@ -1,5 +1,6 @@
 package com.ttstd.dialer.service.main;
 
+import android.text.TextUtils;
 import android.util.Log;
 
 import androidx.lifecycle.ViewModel;
@@ -9,6 +10,7 @@ import com.trello.rxlifecycle4.RxLifecycle;
 import com.trello.rxlifecycle4.android.ActivityEvent;
 import com.ttstd.dialer.bean.BaseResponse;
 import com.ttstd.dialer.bean.req.SnLocationReq;
+import com.ttstd.dialer.gson.GsonUtils;
 import com.ttstd.dialer.network.BaseObserver;
 import com.ttstd.dialer.network.OkHttpManager;
 
@@ -41,7 +43,12 @@ public class MainServiceModel extends ViewModel {
 
 
     public void uploadLocation(SnLocationReq locationReq) {
-        Log.e(TAG, "uploadLocation: ");
+        // 空校验：位置信息缺失时不发起请求，避免后端收到无效数据
+        if (locationReq == null) {
+            Log.e(TAG, "uploadLocation: 定位信息为空或缺少 sn，已跳过上报");
+            return;
+        }
+        Log.e(TAG, "uploadLocation: " + GsonUtils.toJSONString(locationReq));
         OkHttpManager.getInstance().getUploadLocationObservable(locationReq)
                 .compose(bindToLifecycle())
                 .subscribe(new BaseObserver<BaseResponse>() {