diff --git a/backend/app/xinference/base.py b/backend/app/xinference/base.py
index 54cb16d..3a91374 100644
--- a/backend/app/xinference/base.py
+++ b/backend/app/xinference/base.py
@@ -13,6 +13,7 @@ from llama_index.core.instrumentation.events.rerank import ReRankStartEvent, ReR
 from llama_index.core.postprocessor.types import BaseNodePostprocessor
 from llama_index.core.schema import ImageType, NodeWithScore, QueryBundle
 from pydantic import Field
+from win32comext.shell.demos.IUniformResourceLocator import new_sh
 
 logger = logging.getLogger(__name__)
 
@@ -165,17 +166,19 @@ class XinferenceRerank(BaseNodePostprocessor):
             self,
             model_uid: str,
             endpoint: str,
-            top_n: int = 3,
-            threshold: float = 0.3,
+            top_n: int = None,
+            threshold: float = None,
             return_documents: bool = False
     ):
         _model_uid = model_uid
         _endpoint = endpoint
+        _op_n = top_n
+        threshold = threshold
         generator, model_description = self.load_model(
             model_uid, endpoint
         )
         self._generator = generator
-        super().__init__(top_n=top_n, model=model_uid, threshold = threshold, return_documents=return_documents)
+        super().__init__(top_n=top_n, model=model_uid, model_uid=model_uid, threshold = threshold, return_documents=return_documents)
 
     @classmethod
     def class_name(cls) -> str:
@@ -216,8 +219,14 @@ class XinferenceRerank(BaseNodePostprocessor):
                 new_node_with_score = NodeWithScore(
                     node=nodes[result['index']].node, score=result['relevance_score']
                 )
-                if new_node_with_score.score >=self.threshold:
-                    new_nodes.append(new_node_with_score)
+                if self.threshold is not None:
+                    if new_node_with_score.score >=self.threshold:
+                        new_nodes.append(new_node_with_score)
+
+                if self.top_n is not None:
+                    if len(new_nodes) > self.top_n:
+                        for index in new_nodes[5:-1]:
+                            new_nodes.remove(-1)
 
             event.on_end(payload={EventPayload.NODES: new_nodes})