diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/service/CartService.java b/src/main/java/com/chaozhanggui/system/cashierservice/service/CartService.java
index 20188cb..b95ce4e 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/service/CartService.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/service/CartService.java
@@ -669,7 +669,7 @@ public class CartService {
             BigDecimal seatCost = BigDecimal.ZERO;
             for (TbCashierCart tbCashierCart : cashierCartList) {
                 cashierIds.add(tbCashierCart.getId());
-                if (tbCashierCart.getId() == -999) {
+                if ("-999".equals(tbCashierCart.getProductId())) {
                     seatNum = tbCashierCart.getNumber();
                     seatCost = tbCashierCart.getTotalAmount();
                 }