diff --git a/pilot/configs/model_config.py b/pilot/configs/model_config.py
index 12c7e33da..819152845 100644
--- a/pilot/configs/model_config.py
+++ b/pilot/configs/model_config.py
@@ -20,6 +20,7 @@ DEVICE = "cuda" if torch.cuda.is_available() else "cpu"
 LLM_MODEL_CONFIG = {
     "flan-t5-base": os.path.join(MODEL_PATH, "flan-t5-base"),
     "vicuna-13b": os.path.join(MODEL_PATH, "vicuna-13b"),
+    "text2vec": os.path.join(MODEL_PATH, "text2vec"),
     "sentence-transforms": os.path.join(MODEL_PATH, "all-MiniLM-L6-v2")
 }
 
@@ -28,7 +29,7 @@ VECTOR_SEARCH_TOP_K = 3
 LLM_MODEL = "vicuna-13b"
 LIMIT_MODEL_CONCURRENCY = 5
 MAX_POSITION_EMBEDDINGS = 4096 
-VICUNA_MODEL_SERVER = "http://121.41.167.183:8000"
+VICUNA_MODEL_SERVER = "http://121.41.227.141:8000"
 
 # Load model config
 ISLOAD_8BIT = True
diff --git a/pilot/server/webserver.py b/pilot/server/webserver.py
index 139caab4d..e139ff09b 100644
--- a/pilot/server/webserver.py
+++ b/pilot/server/webserver.py
@@ -242,10 +242,10 @@ def http_bot(state, mode, sql_mode, db_selector, temperature, max_new_tokens, re
     if mode == conversation_types["custome"] and not db_selector:
         persist_dir = os.path.join(KNOWLEDGE_UPLOAD_ROOT_PATH, vector_store_name["vs_name"] + ".vectordb")
         print("向量数据库持久化地址: ", persist_dir)
-        knowledge_embedding_client = KnowledgeEmbedding(file_path="", model_name=LLM_MODEL_CONFIG["sentence-transforms"], vector_store_config={"vector_store_name": vector_store_name["vs_name"],
+        knowledge_embedding_client = KnowledgeEmbedding(file_path="", model_name=LLM_MODEL_CONFIG["text2vec"], vector_store_config={"vector_store_name": vector_store_name["vs_name"],
                                                       "vector_store_path": KNOWLEDGE_UPLOAD_ROOT_PATH})
         query = state.messages[-2][1]
-        docs = knowledge_embedding_client.similar_search(query, 1)
+        docs = knowledge_embedding_client.similar_search(query, 10)
         context = [d.page_content for d in docs]
         prompt_template = PromptTemplate(
             template=conv_qa_prompt_template,
@@ -254,6 +254,18 @@ def http_bot(state, mode, sql_mode, db_selector, temperature, max_new_tokens, re
         result = prompt_template.format(context="\n".join(context), question=query)
         state.messages[-2][1] = result
         prompt = state.get_prompt()
+        if len(prompt) > 4000:
+            logger.info("prompt length greater than 4000, rebuild")
+            docs = knowledge_embedding_client.similar_search(query, 5)
+            context = [d.page_content for d in docs]
+            prompt_template = PromptTemplate(
+                template=conv_qa_prompt_template,
+                input_variables=["context", "question"]
+            )
+            result = prompt_template.format(context="\n".join(context), question=query)
+            state.messages[-2][1] = result
+            prompt = state.get_prompt()
+        print(len(prompt))
         state.messages[-2][1] = query
         skip_echo_len = len(prompt.replace("</s>", " ")) + 1
 
@@ -420,7 +432,7 @@ def build_single_model_ui():
         max_output_tokens = gr.Slider(
             minimum=0,
             maximum=1024,
-            value=1024,
+            value=512,
             step=64,
             interactive=True,
             label="最大输出Token数",
@@ -570,7 +582,7 @@ def knowledge_embedding_store(vs_id, files):
         shutil.move(file.name, os.path.join(KNOWLEDGE_UPLOAD_ROOT_PATH, vs_id, filename))
         knowledge_embedding_client = KnowledgeEmbedding(
             file_path=os.path.join(KNOWLEDGE_UPLOAD_ROOT_PATH, vs_id, filename),
-            model_name=LLM_MODEL_CONFIG["sentence-transforms"],
+            model_name=LLM_MODEL_CONFIG["text2vec"],
             vector_store_config={
                 "vector_store_name": vector_store_name["vs_name"],
                 "vector_store_path": KNOWLEDGE_UPLOAD_ROOT_PATH})
diff --git a/pilot/source_embedding/pdf_embedding.py b/pilot/source_embedding/pdf_embedding.py
index 617190fe5..e162aefd8 100644
--- a/pilot/source_embedding/pdf_embedding.py
+++ b/pilot/source_embedding/pdf_embedding.py
@@ -17,8 +17,6 @@ class PDFEmbedding(SourceEmbedding):
         self.file_path = file_path
         self.model_name = model_name
         self.vector_store_config = vector_store_config
-        # SourceEmbedding(file_path =file_path, );
-        SourceEmbedding(file_path, model_name, vector_store_config)
 
     @register
     def read(self):
@@ -30,7 +28,7 @@ class PDFEmbedding(SourceEmbedding):
     def data_process(self, documents: List[Document]):
         i = 0
         for d in documents:
-            documents[i].page_content = d.page_content.replace(" ", "").replace("\n", "")
+            documents[i].page_content = d.page_content.replace("\n", "")
             i += 1
         return documents
 
diff --git a/requirements.txt b/requirements.txt
index 5654dba6f..3bca421f6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -72,4 +72,5 @@ chromadb
 markdown2
 colorama
 playsound
-distro
\ No newline at end of file
+distro
+pypdf
\ No newline at end of file