diff --git a/README.md b/README.md
index efabb79..e1a4831 100644
--- a/README.md
+++ b/README.md
@@ -229,6 +229,7 @@ Web UI 可以实现如下功能：
 - [x] VUE 前端
 
 ## 项目交流群
-![二维码](img/qr_code_30.jpg)
+<img src="img/qr_code_32.jpg" alt="二维码" width="300" height="300" />
 
-🎉 langchain-ChatGLM 项目交流群，如果你也对本项目感兴趣，欢迎加入群聊参与讨论交流。
+
+🎉 langchain-ChatGLM 项目微信交流群，如果你也对本项目感兴趣，欢迎加入群聊参与讨论交流。
diff --git a/img/qr_code_30.jpg b/img/qr_code_30.jpg
deleted file mode 100644
index 9616084..0000000
Binary files a/img/qr_code_30.jpg and /dev/null differ
diff --git a/img/qr_code_32.jpg b/img/qr_code_32.jpg
new file mode 100644
index 0000000..7f90e40
Binary files /dev/null and b/img/qr_code_32.jpg differ
diff --git a/vectorstores/MyFAISS.py b/vectorstores/MyFAISS.py
index 5c417d4..0b26246 100644
--- a/vectorstores/MyFAISS.py
+++ b/vectorstores/MyFAISS.py
@@ -5,6 +5,7 @@ from typing import Any, Callable, List, Tuple, Dict
 from langchain.docstore.base import Docstore
 from langchain.docstore.document import Document
 import numpy as np
+import copy
 
 
 class MyFAISS(FAISS, VectorStore):
@@ -95,7 +96,8 @@ class MyFAISS(FAISS, VectorStore):
             for id in id_seq:
                 if id == id_seq[0]:
                     _id = self.index_to_docstore_id[id]
-                    doc = self.docstore.search(_id)
+                    # doc = self.docstore.search(_id)
+                    doc = copy.deepcopy(self.docstore.search(_id))
                 else:
                     _id0 = self.index_to_docstore_id[id]
                     doc0 = self.docstore.search(_id0)