diff --git a/sf_manufacturing/models/mrp_workcenter.py b/sf_manufacturing/models/mrp_workcenter.py
index f07dd53a..64cf2d8d 100644
--- a/sf_manufacturing/models/mrp_workcenter.py
+++ b/sf_manufacturing/models/mrp_workcenter.py
@@ -24,8 +24,9 @@ class ResWorkcenter(models.Model):
             added_users = new_users - old_users
             removed_users = old_users - new_users
             if added_users or removed_users:
-                message = "增加 → %s \n 移除 → %s （可操作用户）" % (
-                    ','.join(added_users.mapped('name')), ','.join(removed_users.mapped('name')))
+                message = "增加 → %s ; 移除 → %s （可操作用户）" % (
+                    # ','.join(added_users.mapped('name')), ','.join(removed_users.mapped('name')))
+                    added_users.mapped('name'), removed_users.mapped('name'))
                 self.message_post(body=message)
             return res
         return super(ResWorkcenter, self).write(vals)