diff --git a/src/adapter/shopyy.adapter.ts b/src/adapter/shopyy.adapter.ts
index e3e0bda..3b6a4df 100644
--- a/src/adapter/shopyy.adapter.ts
+++ b/src/adapter/shopyy.adapter.ts
@@ -388,15 +388,14 @@ export class ShopyyAdapter implements ISiteAdapter {
           item.last_modified ||
           (typeof item.updated_at === 'string' ? item.updated_at : ''),
       fulfillment_status,
-      fulfillments: item.fulfillments?.map?.((f) => ({
-        id: f.id,
-        tracking_number: f.tracking_number || '',
-        shipping_provider: f.tracking_company || '',
-        shipping_method: f.tracking_company || '',
-       
-        date_created: typeof f.created_at === 'number'
-          ? new Date(f.created_at * 1000).toISOString()
-          : f.created_at || '',
+      fulfillments: item.fulfillments?.map?.((fulfillment) => ({
+        id: fulfillment.id,
+        tracking_number: fulfillment.tracking_number || '',
+        shipping_provider: fulfillment.tracking_company || '',
+        shipping_method: fulfillment.tracking_company || '',
+        date_created: typeof fulfillment.created_at === 'number'
+          ? dayjs(fulfillment.created_at * 1000).toISOString()
+          : dayjs(fulfillment.created_at || '').toISOString(),
         // status: f.payment_tracking_status
       })) || [],
       raw: item,
diff --git a/src/adapter/woocommerce.adapter.ts b/src/adapter/woocommerce.adapter.ts
index c37ab3c..7faaff7 100644
--- a/src/adapter/woocommerce.adapter.ts
+++ b/src/adapter/woocommerce.adapter.ts
@@ -407,7 +407,7 @@ export class WooCommerceAdapter implements ISiteAdapter {
           tracking_number: track.tracking_number,
           tracking_product_code: track.tracking_product_code,
           shipping_provider: track.tracking_provider,
-          date_created: dayjs(track.date_shipped).toString(),
+          date_created: dayjs(Number(track.date_shipped)*1000).toISOString(),
         })
       });
 
diff --git a/src/dto/woocommerce.dto.ts b/src/dto/woocommerce.dto.ts
index 8fe99b1..e6faa11 100644
--- a/src/dto/woocommerce.dto.ts
+++ b/src/dto/woocommerce.dto.ts
@@ -373,7 +373,7 @@ export interface WooOrder {
     export interface MetaDataFulfillment {
       custom_tracking_link: string;
       custom_tracking_provider: string;
-      date_shipped: number;
+      date_shipped: string;
       source: string;
       status_shipped: string;
       tracking_id: string;
diff --git a/src/service/order.service.ts b/src/service/order.service.ts
index fb3baf1..7ce49da 100644
--- a/src/service/order.service.ts
+++ b/src/service/order.service.ts
@@ -1055,13 +1055,6 @@ export class OrderService {
       // 删除原始 ID
       delete item.id;
 
-      // 转换时间戳为日期格式
-      if (item.date_created && typeof item.date_created === 'number') {
-        item.date_created = new Date(item.date_created * 1000);
-      } else if (item.date_created && typeof item.date_created === 'string') {
-        item.date_created = new Date(item.date_created);
-      }
-
       // 创建履约实体
       const fulfillment = plainToClass(OrderFulfillment, item);