diff --git a/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs b/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs
index 8afd27da..c0b294a5 100644
--- a/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs
+++ b/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs
@@ -203,8 +203,8 @@ namespace Tnb.WarehouseMgr
                       else if ((moveNum > areaPreTasks.Count && areaPreTasks.Count > 1) || moveNum < areaPreTasks.Count)
                       {
                           items.ForEach(x => x.is_chain = 1);
-                          var mod = items.Count % moveNum > 0 ? items.Count / moveNum + 1 : items.Count / moveNum;
                           var itemsCount = items.Count;
+                          var mod = items.Count % moveNum > 0 ? itemsCount / moveNum + 1 : itemsCount / moveNum;
                           var start = 0;
                           var end = Math.Min(itemsCount, moveNum);
                           var arrary = items.ToArray();
@@ -218,14 +218,7 @@ namespace Tnb.WarehouseMgr
                                   subArray[j].bill_code = $"{groupCode}-{i}";
                               }
                               start = end;
-                              if ((end + moveNum) >= arrary.Length)
-                              {
-                                  end = arrary.Length;
-                              }
-                              else
-                              {
-                                  end = end + moveNum;
-                              }
+                              end = Math.Min((end + moveNum), arrary.Length);
                           }
                       }
                   });