diff --git a/dsLightRag/Start.py b/dsLightRag/Start.py
index ae3394a0..48dd6608 100644
--- a/dsLightRag/Start.py
+++ b/dsLightRag/Start.py
@@ -6,6 +6,7 @@ import subprocess
 import tempfile
 import urllib
 import uuid
+import asyncio
 from io import BytesIO
 from urllib import request
 
@@ -20,6 +21,9 @@ from starlette.staticfiles import StaticFiles
 from Util.LightRagUtil import *
 from Util.PostgreSQLUtil import init_postgres_pool
 
+rag_instances = {}
+rag_lock = asyncio.Lock()
+
 # 想更详细地控制日志输出
 logger = logging.getLogger('lightrag')
 logger.setLevel(logging.DEBUG)
@@ -30,6 +34,9 @@ logger.addHandler(handler)
 
 async def lifespan(app: FastAPI):
     yield
+    # 在应用关闭时清理rag实例
+    for rag in rag_instances.values():
+        await rag.finalize_storages()
 
 
 app = FastAPI(lifespan=lifespan)
@@ -109,7 +116,11 @@ async def rag(request: fastapi.Request):
     async def generate_response_stream(query: str):
         try:
             logger.info("workspace=" + workspace)
-            rag = await initialize_pg_rag(WORKING_DIR=WORKING_DIR, workspace=workspace)
+            # 使用锁确保线程安全
+            async with rag_lock:
+                if workspace not in rag_instances:
+                    rag_instances[workspace] = await initialize_pg_rag(WORKING_DIR=WORKING_DIR, workspace=workspace)
+            rag = rag_instances[workspace]
             resp = await rag.aquery(
                 query=query,
                 param=QueryParam(mode="hybrid", stream=True, user_prompt=user_prompt))
@@ -121,10 +132,8 @@ async def rag(request: fastapi.Request):
         except Exception as e:
             yield f"data: {json.dumps({'error': str(e)})}\n\n"
         finally:
-            # 发送流结束标记
-            yield "data: [DONE]\n\n"
-            # 清理资源
-            await rag.finalize_storages()
+                # 发送流结束标记
+                yield "data: [DONE]\n\n"
 
     return EventSourceResponse(generate_response_stream(query=query))
 
@@ -396,3 +405,5 @@ async def get_articles(page: int = 1, limit: int = 10):
 
 if __name__ == "__main__":
     uvicorn.run(app, host="0.0.0.0", port=8000)
+
+
diff --git a/dsLightRag/static/ShiJi.html b/dsLightRag/static/ShiJi.html
index bc9cdcd1..7b5ee34f 100644
--- a/dsLightRag/static/ShiJi.html
+++ b/dsLightRag/static/ShiJi.html
@@ -198,7 +198,9 @@
                     <div class="example-item" onclick="fillExample('“皇帝”称号的由来')">
                         “皇帝”称号的由来
                     </div>
-
+                    <div class="example-item" onclick="fillExample('什么是龙相？')">
+                        什么是龙相？
+                    </div>
                 </div>
             </div>
             <div class="example-category">
@@ -216,9 +218,7 @@
                     <div class="example-item" onclick="fillExample('刘邦最终成功是因为什么？')">
                         刘邦最终成功是因为什么？
                     </div>
-                    <div class="example-item" onclick="fillExample('什么是龙相？')">
-                        什么是龙相？
-                    </div>
+
                 </div>
             </div>
             <div class="example-category">