diff --git a/backend/app/Platform/Tmall/EntityParse/Refund.php b/backend/app/Platform/Tmall/EntityParse/Refund.php
index 2d5a93a..06201b9 100644
--- a/backend/app/Platform/Tmall/EntityParse/Refund.php
+++ b/backend/app/Platform/Tmall/EntityParse/Refund.php
@@ -8,6 +8,7 @@ use App\Constants\RefundStatus;
 use App\Constants\RefundType;
 use App\Platform\Tmall\Constants\RefundStatus as TmallRefundStatus;
 use App\Model\Company;
+use App\Model\Order;
 use App\Model\Store;
 use App\Entity\Parse\EntityParse;
 use Carbon\Carbon;
@@ -172,9 +173,90 @@ class Refund extends EntityParse
             ];
         }
 
+        return $this->fillOrderDates($items);
+    }
+
+    /**
+     * 根据退款子项的 store_id + platform_order_id 查询订单，
+     * 将 order_created_date 和 order_paid_date 填入 $items 数组
+     *
+     * 订单搜索范围：[退款 created_date - 3个月, 退款 created_date]
+     *
+     * @param array $items 退款子项数据数组
+     * @return array 填充了订单日期的退款子项数组
+     */
+    protected function fillOrderDates(array $items): array
+    {
+        $lookups = [];
+        foreach ($items as $item) {
+            $key = $item['store_id'] . ':' . $item['platform_order_id'];
+            if (!isset($lookups[$key])) {
+                $lookups[$key] = [
+                    'store_id' => $item['store_id'],
+                    'platform_order_id' => $item['platform_order_id'],
+                    'created_date' => $item['created_date'],
+                ];
+            }
+        }
+
+        if (empty($lookups)) {
+            return $items;
+        }
+
+        $orderDatesMap = $this->queryOrderDates($lookups);
+
+        dump("Matched " . count($orderDatesMap) . " orders for " . count($lookups) . " refund item lookups");
+
+        foreach ($items as &$item) {
+            $key = $item['store_id'] . ':' . $item['platform_order_id'];
+            if (isset($orderDatesMap[$key])) {
+                $item['order_created_date'] = $orderDatesMap[$key]['order_created_date'];
+                $item['order_paid_date'] = $orderDatesMap[$key]['order_paid_date'];
+            }
+        }
+        unset($item);
+
         return $items;
     }
 
+    /**
+     * 根据 store_id + platform_order_id 批量查询订单的创建时间和付款时间
+     *
+     * 订单搜索范围：[退款 created_date - 3个月, 退款 created_date]
+     *
+     * @param array $lookups [key => ['store_id', 'platform_order_id', 'created_date']]
+     * @return array [store_id:platform_order_id => ['order_created_date' => ..., 'order_paid_date' => ...]]
+     */
+    protected function queryOrderDates(array $lookups): array
+    {
+        $orders = Order::query()
+            ->where(function ($query) use ($lookups) {
+                foreach ($lookups as $lookup) {
+                    $createdDate = Carbon::parse($lookup['created_date']);
+                    $query->orWhere(function ($q) use ($lookup, $createdDate) {
+                        $q->where('store_id', $lookup['store_id'])
+                          ->where('platform_order_id', $lookup['platform_order_id'])
+                          ->whereBetween('created_date', [
+                              $createdDate->copy()->subMonths(3),
+                              $createdDate,
+                          ]);
+                    });
+                }
+            })
+            ->get(['store_id', 'platform_order_id', 'created_date', 'paid_date']);
+
+        $map = [];
+        foreach ($orders as $order) {
+            $key = $order->store_id . ':' . $order->platform_order_id;
+            $map[$key] = [
+                'order_created_date' => $order->created_date,
+                'order_paid_date' => $order->paid_date,
+            ];
+        }
+
+        return $map;
+    }
+
     /**
      * 将 Tmall 退款状态映射为系统退款状态 ID
      *