diff --git a/opendelta/basemodel.py b/opendelta/basemodel.py
index 71f8d47..0f6cbc6 100644
--- a/opendelta/basemodel.py
+++ b/opendelta/basemodel.py
@@ -92,6 +92,7 @@ class DeltaBase(nn.Module, SaveLoadMixin):
     default_exclude_modules = ["lm_head"]
     config_class = BaseDeltaConfig
     default_unfrozen_modules = ["deltas"]
+    pass_pseudo_data = True
     def __init__(self,
                  backbone_model: nn.Module,
                  modified_modules: Optional[List[str]] = None,
@@ -200,7 +201,8 @@ class DeltaBase(nn.Module, SaveLoadMixin):
             if self.find_key(key, modified_modules): #TODO may have bugs when commonstructure has a virtual node and it's refered
                 logger.debug("find key: {}".format(key))
                 self.update_module(backbone, key)
-        self._pseudo_data_to_instantiate(backbone)
+        if self.pass_pseudo_data:
+            self._pseudo_data_to_instantiate(backbone)
         # mark the paratmers that are the delta parameters for easily displaying the delta_paramters.
         self.mark_as_delta()
         return backbone
@@ -329,7 +331,6 @@ class DeltaBase(nn.Module, SaveLoadMixin):
             module (:obj:`nn.Module`, *optional*, default to :obj:`None`): The backbone model.
 
         """
-        return
         if module is None:
             module = self.backbone_model
         device = get_device(module)
diff --git a/opendelta/delta_models/lora.py b/opendelta/delta_models/lora.py
index 2c172d6..38c629a 100644
--- a/opendelta/delta_models/lora.py
+++ b/opendelta/delta_models/lora.py
@@ -97,6 +97,7 @@ class LoraModel(DeltaBase):
     config_class = LoraConfig
     delta_type = "lora"
     default_modified_modules = ['attn.q', 'attn.v']
+    pass_pseudo_data = False
     def __init__(self,
                  backbone_model: nn.Module,
                  lora_r=8,