diff --git a/app/common/service/UsedCarDetailService.php b/app/common/service/UsedCarDetailService.php
index a22c2a3..5c533ff 100644
--- a/app/common/service/UsedCarDetailService.php
+++ b/app/common/service/UsedCarDetailService.php
@@ -463,6 +463,9 @@ class UsedCarDetailService
             ->orderBy('created_at', 'desc')
             ->get()
             ->map(function ($item) {
+                if(!is_numeric($item->created_at)){
+                    $item->created_at = strtotime($item->created_at);
+                }
                 return [
                     'id' => $item->id,
                     'audit_status' => $item->audit_status,