diff --git a/BO/Views/croom/documentspast.cshtml b/BO/Views/croom/documentspast.cshtml
index 2ff121d..4494e59 100644
--- a/BO/Views/croom/documentspast.cshtml
+++ b/BO/Views/croom/documentspast.cshtml
@@ -152,7 +152,7 @@
                             <td>@item.kind</td>
                             <td>@item.cshape</td>
                             <td>@item.username</td>
-                            <td>@item.userpno</td>
+                            <td>@(item.userpno.Length > 7 ? item.userpno.Insert(6,"-") : item.userpno)</td>
                             <td>@item.typeman</td>
                             <td>@item.edukind</td>
                             <td>@item.typeedu</td>