diff --git a/README.md b/README.md
index 619348d..b630adc 100644
--- a/README.md
+++ b/README.md
@@ -221,6 +221,6 @@ 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_18.jpg)
+![二维码](img/qr_code_21.jpg)
 
 🎉 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。
diff --git a/chains/local_doc_qa.py b/chains/local_doc_qa.py
index 8b69e69..ecd5e88 100644
--- a/chains/local_doc_qa.py
+++ b/chains/local_doc_qa.py
@@ -130,7 +130,7 @@ def similarity_search_with_score_by_vector(
             else:
                 _id0 = self.index_to_docstore_id[id]
                 doc0 = self.docstore.search(_id0)
-                doc.page_content += doc0.page_content
+                doc.page_content += " " + doc0.page_content
         if not isinstance(doc, Document):
             raise ValueError(f"Could not find document for id {_id}, got {doc}")
         doc_score = min([scores[0][id] for id in [indices[0].tolist().index(i) for i in id_seq if i in indices[0]]])
diff --git a/docs/INSTALL.md b/docs/INSTALL.md
index 9808133..83e52ab 100644
--- a/docs/INSTALL.md
+++ b/docs/INSTALL.md
@@ -33,6 +33,10 @@ $ cd langchain-ChatGLM
 # 项目中 pdf 加载由先前的 detectron2 替换为使用 paddleocr，如果之前有安装过 detectron2 需要先完成卸载避免引发 tools 冲突
 $ pip uninstall detectron2
 
+# 检查paddleocr依赖，linux环境下paddleocr依赖libX11，libXext
+$ yum install libX11
+$ yum install libXext
+
 # 安装依赖
 $ pip install -r requirements.txt
 
diff --git a/img/qr_code_18.jpg b/img/qr_code_18.jpg
deleted file mode 100644
index 195d89d..0000000
Binary files a/img/qr_code_18.jpg and /dev/null differ
diff --git a/img/qr_code_21.jpg b/img/qr_code_21.jpg
new file mode 100644
index 0000000..a8d374b
Binary files /dev/null and b/img/qr_code_21.jpg differ
diff --git a/models/chatglm_llm.py b/models/chatglm_llm.py
index ae5b6dd..ea53737 100644
--- a/models/chatglm_llm.py
+++ b/models/chatglm_llm.py
@@ -54,7 +54,7 @@ class ChatGLM(BaseAnswer, LLM, ABC):
         stopping_criteria_list.append(listenerQueue)
 
         if streaming:
-
+            history += [[]]
             for inum, (stream_resp, _) in enumerate(self.checkPoint.model.stream_chat(
                     self.checkPoint.tokenizer,
                     prompt,
@@ -64,10 +64,7 @@ class ChatGLM(BaseAnswer, LLM, ABC):
                     stopping_criteria=stopping_criteria_list
             )):
                 self.checkPoint.clear_torch_cache()
-                if inum == 0:
-                    history += [[prompt, stream_resp]]
-                else:
-                    history[-1] = [prompt, stream_resp]
+                history[-1] = [prompt, stream_resp]
                 answer_result = AnswerResult()
                 answer_result.history = history
                 answer_result.llm_output = {"answer": stream_resp}
diff --git a/views/src/views/chat/index.vue b/views/src/views/chat/index.vue
index 2389f59..2087357 100644
--- a/views/src/views/chat/index.vue
+++ b/views/src/views/chat/index.vue
@@ -116,6 +116,7 @@ async function handleSubmit() {
 
 async function onConversation() {
   const message = prompt.value
+	history.value = []
   if (usingContext.value) {
     for (let i = 0; i < dataSources.value.length; i = i + 2) {
       if (!i)
diff --git a/webui.py b/webui.py
index d535c9d..ea1fe03 100644
--- a/webui.py
+++ b/webui.py
@@ -466,4 +466,4 @@ with gr.Blocks(css=block_css, theme=gr.themes.Default(**default_theme_args)) as
          server_port=7860,
          show_api=False,
          share=False,
-         inbrowser=False))
+         inbrowser=False))
\ No newline at end of file