diff --git a/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/PayOrderCoreService.java b/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/PayOrderCoreService.java
index 40adf4ed2..7a6271ad3 100644
--- a/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/PayOrderCoreService.java
+++ b/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/PayOrderCoreService.java
@@ -1,5 +1,6 @@
 package cn.iocoder.yudao.coreservice.modules.pay.service.order;
 
+import cn.iocoder.yudao.coreservice.modules.pay.dal.dataobject.order.PayOrderDO;
 import cn.iocoder.yudao.coreservice.modules.pay.service.order.dto.PayOrderCreateReqDTO;
 import cn.iocoder.yudao.coreservice.modules.pay.service.order.dto.PayOrderSubmitReqDTO;
 import cn.iocoder.yudao.coreservice.modules.pay.service.order.dto.PayOrderSubmitRespDTO;
@@ -13,6 +14,14 @@ import javax.validation.Valid;
  */
 public interface PayOrderCoreService {
 
+   /**
+    * 获得支付单
+    *
+    * @param id 支付单编号
+    * @return 支付单
+    */
+   PayOrderDO getPayOrder(Long id);
+
    /**
     * 创建支付单
     *
diff --git a/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/dto/PayOrderSubmitReqDTO.java b/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/dto/PayOrderSubmitReqDTO.java
index 007523678..eb08fbb3e 100644
--- a/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/dto/PayOrderSubmitReqDTO.java
+++ b/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/dto/PayOrderSubmitReqDTO.java
@@ -1,7 +1,5 @@
 package cn.iocoder.yudao.coreservice.modules.pay.service.order.dto;
 
-import com.baomidou.mybatisplus.annotation.TableField;
-import com.baomidou.mybatisplus.extension.handlers.JacksonTypeHandler;
 import lombok.Data;
 import lombok.experimental.Accessors;
 
@@ -32,7 +30,7 @@ public class PayOrderSubmitReqDTO implements Serializable {
     /**
      * 支付渠道
      */
-    @NotNull(message = "支付渠道")
+    @NotEmpty(message = "支付渠道不能为空")
     private String channelCode;
 
     /**
@@ -44,7 +42,6 @@ public class PayOrderSubmitReqDTO implements Serializable {
     /**
      * 支付渠道的额外参数
      */
-    @TableField(typeHandler = JacksonTypeHandler.class)
     private Map<String, String> channelExtras;
 
 }
diff --git a/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/impl/PayOrderCoreServiceImpl.java b/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/impl/PayOrderCoreServiceImpl.java
index 344229c5a..7edbeacbb 100644
--- a/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/impl/PayOrderCoreServiceImpl.java
+++ b/yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/order/impl/PayOrderCoreServiceImpl.java
@@ -56,6 +56,11 @@ public class PayOrderCoreServiceImpl implements PayOrderCoreService {
     @Resource
     private PayOrderExtensionCoreMapper payOrderExtensionCoreMapper;
 
+    @Override
+    public PayOrderDO getPayOrder(Long id) {
+        return payOrderCoreMapper.selectById(id);
+    }
+
     @Override
     public Long createPayOrder(PayOrderCreateReqDTO reqDTO) {
         // 校验 App
diff --git a/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/order/PayOrderController.java b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/order/PayOrderController.java
new file mode 100644
index 000000000..2b298e4c2
--- /dev/null
+++ b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/order/PayOrderController.java
@@ -0,0 +1,53 @@
+package cn.iocoder.yudao.userserver.modules.pay.controller.order;
+
+import cn.hutool.core.bean.BeanUtil;
+import cn.iocoder.yudao.coreservice.modules.pay.dal.dataobject.order.PayOrderDO;
+import cn.iocoder.yudao.coreservice.modules.pay.service.order.PayOrderCoreService;
+import cn.iocoder.yudao.coreservice.modules.pay.service.order.dto.PayOrderSubmitReqDTO;
+import cn.iocoder.yudao.coreservice.modules.pay.service.order.dto.PayOrderSubmitRespDTO;
+import cn.iocoder.yudao.framework.common.pojo.CommonResult;
+import cn.iocoder.yudao.userserver.modules.pay.controller.order.vo.PayOrderSubmitReqVO;
+import cn.iocoder.yudao.userserver.modules.pay.controller.order.vo.PayOrderSubmitRespVO;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.annotation.Resource;
+
+import static cn.iocoder.yudao.framework.common.pojo.CommonResult.success;
+import static cn.iocoder.yudao.framework.common.util.servlet.ServletUtils.getClientIP;
+
+@Api(tags = "支付订单")
+@RestController
+@RequestMapping("/pay/order")
+@Validated
+@Slf4j
+public class PayOrderController {
+
+    @Resource
+    private PayOrderCoreService payOrderCoreService;
+
+    @PostMapping("/submit")
+    @ApiOperation("提交支付订单")
+//    @PreAuthenticated // TODO 暂时不加登陆验证，前端暂时没做好
+    public CommonResult<PayOrderSubmitRespVO> submit(@RequestBody PayOrderSubmitReqVO reqVO) {
+        // 获得订单
+        PayOrderDO payOrder = payOrderCoreService.getPayOrder(reqVO.getId());
+
+        // 提交支付
+        PayOrderSubmitReqDTO reqDTO = new PayOrderSubmitReqDTO();
+        BeanUtil.copyProperties(reqVO, reqDTO, false);
+        reqDTO.setUserIp(getClientIP());
+        reqDTO.setAppId(payOrder.getAppId());
+        PayOrderSubmitRespDTO respDTO = payOrderCoreService.submitPayOrder(reqDTO);
+
+        // 拼接返回
+        return success(PayOrderSubmitRespVO.builder().invokeResponse(respDTO.getInvokeResponse()).build());
+    }
+
+}
diff --git a/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/order/vo/PayOrderSubmitReqVO.java b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/order/vo/PayOrderSubmitReqVO.java
new file mode 100644
index 000000000..407edb171
--- /dev/null
+++ b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/order/vo/PayOrderSubmitReqVO.java
@@ -0,0 +1,28 @@
+package cn.iocoder.yudao.userserver.modules.pay.controller.order.vo;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+import lombok.experimental.Accessors;
+
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.NotNull;
+import java.util.Map;
+
+@ApiModel("支付订单提交 Request VO")
+@Data
+@Accessors(chain = true)
+public class PayOrderSubmitReqVO {
+
+    @ApiModelProperty(value = "支付单编号", required = true, example = "1024")
+    @NotNull(message = "支付单编号不能为空")
+    private Long id;
+
+    @ApiModelProperty(value = "支付渠道", required = true, example = "wx_pub")
+    @NotEmpty(message = "支付渠道不能为空")
+    private String channelCode;
+
+    @ApiModelProperty(value = "支付渠道的额外参数", notes = "例如说，微信公众号需要传递 openid 参数")
+    private Map<String, String> channelExtras;
+
+}
diff --git a/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/order/vo/PayOrderSubmitRespVO.java b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/order/vo/PayOrderSubmitRespVO.java
new file mode 100644
index 000000000..cddc79c98
--- /dev/null
+++ b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/order/vo/PayOrderSubmitRespVO.java
@@ -0,0 +1,23 @@
+package cn.iocoder.yudao.userserver.modules.pay.controller.order.vo;
+
+import io.swagger.annotations.ApiModel;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.experimental.Accessors;
+
+@ApiModel("支付订单提交 Response VO")
+@Data
+@Accessors(chain = true)
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class PayOrderSubmitRespVO {
+
+    /**
+     * 调用支付渠道的响应结果
+     */
+    private String invokeResponse;
+
+}
diff --git a/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/package-info.java b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/package-info.java
new file mode 100644
index 000000000..739bfdd5a
--- /dev/null
+++ b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/controller/package-info.java
@@ -0,0 +1 @@
+package cn.iocoder.yudao.userserver.modules.pay.controller;
diff --git a/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/package-info.java b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/package-info.java
new file mode 100644
index 000000000..1aa11cdd2
--- /dev/null
+++ b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/pay/package-info.java
@@ -0,0 +1,7 @@
+/**
+ * pay 包下，我们放支付业务，提供业务的支付能力。
+ * 例如说：商户、应用、支付、退款等等
+ *
+ * 缩写：pay
+ */
+package cn.iocoder.yudao.userserver.modules.pay;
diff --git a/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/shop/controller/ShopOrderController.java b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/shop/controller/ShopOrderController.java
new file mode 100644
index 000000000..8075aba5e
--- /dev/null
+++ b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/shop/controller/ShopOrderController.java
@@ -0,0 +1,55 @@
+package cn.iocoder.yudao.userserver.modules.shop.controller;
+
+import cn.iocoder.yudao.coreservice.modules.pay.service.order.PayOrderCoreService;
+import cn.iocoder.yudao.coreservice.modules.pay.service.order.dto.PayOrderCreateReqDTO;
+import cn.iocoder.yudao.framework.common.pojo.CommonResult;
+import cn.iocoder.yudao.framework.common.util.date.DateUtils;
+import cn.iocoder.yudao.userserver.modules.shop.controller.vo.ShopOrderCreateRespVO;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.annotation.Resource;
+import java.time.Duration;
+
+import static cn.iocoder.yudao.framework.common.pojo.CommonResult.success;
+import static cn.iocoder.yudao.framework.common.util.servlet.ServletUtils.getClientIP;
+
+@Api(tags = "商城订单")
+@RestController
+@RequestMapping("/shop/order")
+@Validated
+@Slf4j
+public class ShopOrderController {
+
+    @Resource
+    private PayOrderCoreService payOrderCoreService;
+
+    @PostMapping("/create")
+    @ApiOperation("创建商城订单")
+//    @PreAuthenticated // TODO 暂时不加登陆验证，前端暂时没做好
+    public CommonResult<ShopOrderCreateRespVO> create() {
+        // 假装创建商城订单
+        Long shopOrderId = System.currentTimeMillis();
+
+        // 创建对应的支付订单
+        PayOrderCreateReqDTO reqDTO = new PayOrderCreateReqDTO();
+        reqDTO.setAppId(6L);
+        reqDTO.setUserIp(getClientIP());
+        reqDTO.setMerchantOrderId(String.valueOf(System.currentTimeMillis()));
+        reqDTO.setSubject("标题：" + shopOrderId);
+        reqDTO.setBody("内容：" + shopOrderId);
+        reqDTO.setAmount(100);
+        reqDTO.setExpireTime(DateUtils.addTime(Duration.ofDays(1)));
+        Long payOrderId = payOrderCoreService.createPayOrder(reqDTO);
+
+        // 拼接返回
+        return success(ShopOrderCreateRespVO.builder().id(shopOrderId)
+                .payOrderId(payOrderId).build());
+    }
+
+}
diff --git a/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/shop/controller/vo/ShopOrderCreateRespVO.java b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/shop/controller/vo/ShopOrderCreateRespVO.java
new file mode 100644
index 000000000..682afc4e9
--- /dev/null
+++ b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/shop/controller/vo/ShopOrderCreateRespVO.java
@@ -0,0 +1,21 @@
+package cn.iocoder.yudao.userserver.modules.shop.controller.vo;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+
+@ApiModel("商城订单创建 Response VO")
+@Data
+@Builder
+@AllArgsConstructor
+public class ShopOrderCreateRespVO {
+
+    @ApiModelProperty(value = "商城订单编号", required = true, example = "1024")
+    private Long id;
+
+    @ApiModelProperty(value = "支付订单编号", required = true, example = "2048")
+    private Long payOrderId;
+
+}
diff --git a/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/shop/package-info.java b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/shop/package-info.java
new file mode 100644
index 000000000..c592130af
--- /dev/null
+++ b/yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/shop/package-info.java
@@ -0,0 +1,8 @@
+/**
+ * shop 包下，我们放商城业务
+ * 例如说：商品、订单等等
+ * 注意，目前仅仅作为 demo 演示，对接 pay 支付系统
+ *
+ * 缩写：shop
+ */
+package cn.iocoder.yudao.userserver.modules.shop;