diff --git a/order-center-cp/cp-oc-domain/src/main/java/org/example/cp/oms/domain/model/OrderMain.java b/order-center-cp/cp-oc-domain/src/main/java/org/example/cp/oms/domain/model/OrderMain.java
index 746d2e3..6219771 100644
--- a/order-center-cp/cp-oc-domain/src/main/java/org/example/cp/oms/domain/model/OrderMain.java
+++ b/order-center-cp/cp-oc-domain/src/main/java/org/example/cp/oms/domain/model/OrderMain.java
@@ -8,6 +8,7 @@
 import org.example.cp.oms.spec.exception.OrderException;
 import org.example.cp.oms.domain.model.vo.ProductDelegate;
 import org.example.cp.oms.spec.model.IOrderMain;
+import org.example.cp.oms.spec.model.vo.IOrderItemDelegate;
 import org.example.cp.oms.spec.model.vo.IProductDelegate;
 
 import javax.validation.constraints.NotNull;
@@ -101,7 +102,12 @@ public void setX2(String x2) {
 
     @Override
     public IProductDelegate productDelegate() {
-        return null;
+        return productDelegate;
+    }
+
+    @Override
+    public IOrderItemDelegate itemDelegate() {
+        return orderItemDelegate;
     }
 
     @Override
diff --git a/order-center-cp/cp-oc-domain/src/main/java/org/example/cp/oms/domain/step/submitorder/StockStep.java b/order-center-cp/cp-oc-domain/src/main/java/org/example/cp/oms/domain/step/submitorder/StockStep.java
index 93e0e1e..32ade85 100644
--- a/order-center-cp/cp-oc-domain/src/main/java/org/example/cp/oms/domain/step/submitorder/StockStep.java
+++ b/order-center-cp/cp-oc-domain/src/main/java/org/example/cp/oms/domain/step/submitorder/StockStep.java
@@ -19,7 +19,7 @@ public class StockStep extends SubmitOrderStep {
     
     @Override
     public void execute(@NotNull OrderMain model) throws OrderException {
-        stockService.occupyStock("SKU098");
+        stockService.occupyStock(model);
     }
 
     @Override
diff --git a/order-center-cp/cp-oc-spec/src/main/java/org/example/cp/oms/spec/model/IOrderMain.java b/order-center-cp/cp-oc-spec/src/main/java/org/example/cp/oms/spec/model/IOrderMain.java
index 2b2f973..c870de6 100644
--- a/order-center-cp/cp-oc-spec/src/main/java/org/example/cp/oms/spec/model/IOrderMain.java
+++ b/order-center-cp/cp-oc-spec/src/main/java/org/example/cp/oms/spec/model/IOrderMain.java
@@ -1,6 +1,7 @@
 package org.example.cp.oms.spec.model;
 
 import io.github.dddplus.api.RequestProfile;
+import org.example.cp.oms.spec.model.vo.IOrderItemDelegate;
 import org.example.cp.oms.spec.model.vo.IProductDelegate;
 import io.github.dddplus.model.IDomainModel;
 import lombok.NonNull;
@@ -17,6 +18,8 @@ public interface IOrderMain extends IDomainModel {
      */
     IProductDelegate productDelegate();
 
+    IOrderItemDelegate itemDelegate();
+
     /**
      * 获取当前的请求参数.
      */
diff --git a/order-center-cp/cp-oc-spec/src/main/java/org/example/cp/oms/spec/model/vo/IOrderItem.java b/order-center-cp/cp-oc-spec/src/main/java/org/example/cp/oms/spec/model/vo/IOrderItem.java
index 688e72c..f5b7c4f 100644
--- a/order-center-cp/cp-oc-spec/src/main/java/org/example/cp/oms/spec/model/vo/IOrderItem.java
+++ b/order-center-cp/cp-oc-spec/src/main/java/org/example/cp/oms/spec/model/vo/IOrderItem.java
@@ -1,4 +1,8 @@
 package org.example.cp.oms.spec.model.vo;
 
 public interface IOrderItem {
+
+    String getSku();
+    Integer getQuantity();
+
 }
diff --git a/order-center-domain-stock/order-center-stock-domain/src/main/java/org/example/oms/d/stock/domain/service/StockService.java b/order-center-domain-stock/order-center-stock-domain/src/main/java/org/example/oms/d/stock/domain/service/StockService.java
index 81ab70d..d024aaa 100644
--- a/order-center-domain-stock/order-center-stock-domain/src/main/java/org/example/oms/d/stock/domain/service/StockService.java
+++ b/order-center-domain-stock/order-center-stock-domain/src/main/java/org/example/oms/d/stock/domain/service/StockService.java
@@ -2,6 +2,8 @@
 
 import io.github.dddplus.annotation.DomainService;
 import lombok.extern.slf4j.Slf4j;
+import org.example.cp.oms.spec.model.IOrderMain;
+import org.example.cp.oms.spec.model.vo.IOrderItem;
 import org.example.oms.d.stock.domain.facade.rpc.IRemoteStockRpc;
 import org.example.oms.d.stock.spec.StockDomain;
 import org.example.oms.d.stock.spec.service.IStockService;
@@ -16,10 +18,13 @@ public class StockService implements IStockService {
     private IRemoteStockRpc remoteStockRpc;
 
     @Override
-    public void occupyStock(String sku) {
+    public void occupyStock(IOrderMain orderMain) {
         log.info("会通过infrastructure层调用库存中心的RPC接口，执行预占库存动作");
         log.info("这里的逻辑，主要是根据不同业务场景组织库存中心RPC的入参，并对返回结果进行处理");
 
-        remoteStockRpc.doOccupy(sku, 5);
+        for (IOrderItem item : orderMain.itemDelegate().getItems()) {
+            // 生产环境，看到会批量调用，这里只是演示
+            remoteStockRpc.doOccupy(item.getSku(), item.getQuantity());
+        }
     }
 }
diff --git a/order-center-domain-stock/order-center-stock-spec/pom.xml b/order-center-domain-stock/order-center-stock-spec/pom.xml
index 43d1ca9..1dd74d0 100644
--- a/order-center-domain-stock/order-center-stock-spec/pom.xml
+++ b/order-center-domain-stock/order-center-stock-spec/pom.xml
@@ -12,4 +12,12 @@
 
     <!-- 支撑域的spec包，是不依赖core domain的spec包的：自治 -->
 
+    <dependencies>
+        <dependency>
+            <groupId>org.example</groupId>
+            <artifactId>cp-oc-spec</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+    </dependencies>
+
 </project>
diff --git a/order-center-domain-stock/order-center-stock-spec/src/main/java/org/example/oms/d/stock/spec/service/IStockService.java b/order-center-domain-stock/order-center-stock-spec/src/main/java/org/example/oms/d/stock/spec/service/IStockService.java
index 1c8b6ec..774a630 100644
--- a/order-center-domain-stock/order-center-stock-spec/src/main/java/org/example/oms/d/stock/spec/service/IStockService.java
+++ b/order-center-domain-stock/order-center-stock-spec/src/main/java/org/example/oms/d/stock/spec/service/IStockService.java
@@ -1,6 +1,7 @@
 package org.example.oms.d.stock.spec.service;
 
 import io.github.dddplus.model.IDomainService;
+import org.example.cp.oms.spec.model.IOrderMain;
 
 // 库存相关的服务，都收敛在库存支撑域，通过领域服务提供给订单核心域调用：JVM内调用, not RPC
 public interface IStockService extends IDomainService {
@@ -8,8 +9,8 @@ public interface IStockService extends IDomainService {
     /**
      * 预占预存.
      *
-     * @param sku 商品的sku编号
+     * @param orderMain core domain提供的领域模型聚合根
      */
-    void occupyStock(String sku);
+    void occupyStock(IOrderMain orderMain);
 
 }