diff --git a/src/service/order.service.ts b/src/service/order.service.ts
index e5dd3f3..ba23cc3 100644
--- a/src/service/order.service.ts
+++ b/src/service/order.service.ts
@@ -1295,79 +1295,44 @@ export class OrderService {
       console.log('create order sale origin error: ', error.message);
     }
 
+    // 关联数据：订阅与相关订单（用于前端关联展示）
+    let relatedList: any[] = [];
+    try {
+      const related = await this.getRelatedByOrder(id);
+      relatedList = [
+        ...(Array.isArray(related?.subscriptions) ? related.subscriptions : []),
+        ...(Array.isArray(related?.orders) ? related.orders : []),
+      ];
+    } catch (error) {
+      // 关联查询失败不影响详情返回
+    }
+
     return {
       ...order,
-      siteName: site.siteName,
-      email: site.email,
+      siteName: site?.siteName,
+      email: site?.email,
       items,
       sales,
       refundItems,
       notes,
       shipment,
+      related: relatedList,
     };
   }
 
   async getRelatedByOrder(orderId: number) {
     const order = await this.orderModel.findOne({ where: { id: orderId } });
     if (!order) throw new Error('订单不存在');
-    const items = await this.orderItemModel.find({ where: { orderId } });
     const siteId = order.siteId;
-    const productIds = items.map(i => i.externalProductId).filter(Boolean);
-    const variationIds = items.map(i => i.externalVariationId).filter(Boolean);
-
     const subSql = `
       SELECT * FROM subscription s
       WHERE s.siteId = ? AND s.parent_id = ?
     `;
     const subscriptions = await this.orderModel.query(subSql, [siteId, order.externalOrderId]);
 
-    let conds: string[] = [];
-    let params: any[] = [siteId, orderId];
-    if (productIds.length > 0) {
-      conds.push(`oi.externalProductId IN (${productIds.map(() => '?').join(',')})`);
-      params = [...productIds, ...params];
-    }
-    if (variationIds.length > 0) {
-      conds.push(`oi.externalVariationId IN (${variationIds.map(() => '?').join(',')})`);
-      params = [...variationIds, ...params];
-    }
-    const whereCond = conds.length ? `AND (${conds.join(' OR ')})` : '';
-    const relatedItemOrdersSql = `
-      SELECT DISTINCT o.*
-      FROM order_item oi
-      INNER JOIN \`order\` o ON o.id = oi.orderId
-      WHERE oi.siteId = ?
-        ${whereCond}
-        AND o.id <> ?
-      ORDER BY o.date_created DESC
-      LIMIT 100
-    `;
-    const relatedByItems = await this.orderItemModel.query(relatedItemOrdersSql, params);
-
-    const relatedBySubscriptionSql = `
-      SELECT DISTINCT o.*
-      FROM \`order\` o
-      WHERE o.siteId = ?
-        AND o.customer_email = ?
-        AND o.id <> ?
-        AND EXISTS (
-          SELECT 1 FROM order_item oi
-          WHERE oi.orderId = o.id
-            AND (
-              JSON_CONTAINS(JSON_EXTRACT(oi.meta_data, '$[*].key'), '"is_subscription"')
-              OR JSON_CONTAINS(JSON_EXTRACT(oi.meta_data, '$[*].key'), '"_wcs_bought_as_subscription"')
-              OR JSON_CONTAINS(JSON_EXTRACT(oi.meta_data, '$[*].key'), '"_wcsatt_scheme"')
-              OR JSON_CONTAINS(JSON_EXTRACT(oi.meta_data, '$[*].key'), '"_subscription"')
-            )
-        )
-      ORDER BY o.date_created DESC
-      LIMIT 100
-    `;
-    const relatedBySubscription = await this.orderModel.query(relatedBySubscriptionSql, [siteId, order.customer_email, orderId]);
 
     const allOrdersMap = new Map<number, any>();
-    relatedByItems.forEach(o => allOrdersMap.set(o.id, o));
-    relatedBySubscription.forEach(o => allOrdersMap.set(o.id, o));
+    subscriptions.forEach(o => allOrdersMap.set(o.id, o));
 
     return {
       order,