diff --git a/src/api_demo.py b/src/api_demo.py
index f7649e7b..c0ca9760 100644
--- a/src/api_demo.py
+++ b/src/api_demo.py
@@ -1,8 +1,3 @@
-# coding=utf-8
-# Implements API for fine-tuned models in OpenAI's format. (https://platform.openai.com/docs/api-reference/chat)
-# Usage: python api_demo.py --model_name_or_path path_to_model --checkpoint_dir path_to_checkpoint
-# Visit http://localhost:8000/docs for document.
-
 import uvicorn
 
 from llmtuner import ChatModel, create_app
@@ -12,6 +7,7 @@ def main():
     chat_model = ChatModel()
     app = create_app(chat_model)
     uvicorn.run(app, host="0.0.0.0", port=8000, workers=1)
+    # Visit http://localhost:8000/docs for document.
 
 
 if __name__ == "__main__":
diff --git a/src/cli_demo.py b/src/cli_demo.py
index 2d0aff7e..05e8c8eb 100644
--- a/src/cli_demo.py
+++ b/src/cli_demo.py
@@ -1,7 +1,3 @@
-# coding=utf-8
-# Implements stream chat in command line for fine-tuned models.
-# Usage: python cli_demo.py --model_name_or_path path_to_model --checkpoint_dir path_to_checkpoint
-
 from llmtuner import ChatModel
 
 
diff --git a/src/export_model.py b/src/export_model.py
index a0a86996..4baeb2c3 100644
--- a/src/export_model.py
+++ b/src/export_model.py
@@ -1,7 +1,3 @@
-# coding=utf-8
-# Exports the fine-tuned model.
-# Usage: python export_model.py --checkpoint_dir path_to_checkpoint --output_dir path_to_save_model
-
 from llmtuner import export_model
 
 
diff --git a/src/llmtuner/__init__.py b/src/llmtuner/__init__.py
index 04ffbb67..e647b92b 100644
--- a/src/llmtuner/__init__.py
+++ b/src/llmtuner/__init__.py
@@ -3,7 +3,7 @@
 from llmtuner.api import create_app
 from llmtuner.chat import ChatModel
 from llmtuner.tuner import export_model, run_exp
-from llmtuner.webui import Manager, WebChatModel, create_ui, create_chat_box
+from llmtuner.webui import create_ui, create_web_demo
 
 
 __version__ = "0.1.5"
diff --git a/src/llmtuner/webui/__init__.py b/src/llmtuner/webui/__init__.py
index 8544957c..a27c7f6e 100644
--- a/src/llmtuner/webui/__init__.py
+++ b/src/llmtuner/webui/__init__.py
@@ -1,4 +1 @@
-from llmtuner.webui.chat import WebChatModel
-from llmtuner.webui.interface import create_ui
-from llmtuner.webui.manager import Manager
-from llmtuner.webui.components import create_chat_box
+from llmtuner.webui.interface import create_ui, create_web_demo
diff --git a/src/llmtuner/webui/chat.py b/src/llmtuner/webui/chat.py
index 01e6f0e4..d0eb61df 100644
--- a/src/llmtuner/webui/chat.py
+++ b/src/llmtuner/webui/chat.py
@@ -10,11 +10,12 @@ from llmtuner.webui.locales import ALERTS
 
 class WebChatModel(ChatModel):
 
-    def __init__(self, args: Optional[Dict[str, Any]] = None) -> None:
-        self.model = None
-        self.tokenizer = None
-        self.generating_args = GeneratingArguments()
-        if args is not None:
+    def __init__(self, args: Optional[Dict[str, Any]] = None, lazy_init: Optional[bool] = True) -> None:
+        if lazy_init:
+            self.model = None
+            self.tokenizer = None
+            self.generating_args = GeneratingArguments()
+        else:
             super().__init__(args)
 
     def load_model(
diff --git a/src/llmtuner/webui/interface.py b/src/llmtuner/webui/interface.py
index afc50d6e..2fb61d37 100644
--- a/src/llmtuner/webui/interface.py
+++ b/src/llmtuner/webui/interface.py
@@ -6,8 +6,10 @@ from llmtuner.webui.components import (
     create_sft_tab,
     create_eval_tab,
     create_infer_tab,
-    create_export_tab
+    create_export_tab,
+    create_chat_box
 )
+from llmtuner.webui.chat import WebChatModel
 from llmtuner.webui.css import CSS
 from llmtuner.webui.manager import Manager
 from llmtuner.webui.runner import Runner
@@ -53,6 +55,23 @@ def create_ui() -> gr.Blocks:
     return demo
 
 
+def create_web_demo() -> gr.Blocks:
+    chat_model = WebChatModel(lazy_init=False)
+
+    with gr.Blocks(title="Web Demo", css=CSS) as demo:
+        lang = gr.Dropdown(choices=["en", "zh"], value="en")
+
+        _, _, _, chat_elems = create_chat_box(chat_model, visible=True)
+
+        manager = Manager([{"lang": lang}, chat_elems])
+
+        demo.load(manager.gen_label, [lang], [lang] + list(chat_elems.values()))
+
+        lang.change(manager.gen_label, [lang], [lang] + list(chat_elems.values()))
+
+    return demo
+
+
 if __name__ == "__main__":
     demo = create_ui()
     demo.queue()
diff --git a/src/web_demo.py b/src/web_demo.py
index 112bac8b..257536ab 100644
--- a/src/web_demo.py
+++ b/src/web_demo.py
@@ -1,30 +1,8 @@
-# coding=utf-8
-# Implements user interface in browser for fine-tuned models.
-# Usage: python web_demo.py --model_name_or_path path_to_model --checkpoint_dir path_to_checkpoint
-
-import gradio as gr
-from transformers.utils.versions import require_version
-
-from llmtuner import Manager, WebChatModel, create_chat_box
-
-
-require_version("gradio>=3.36.0", "To fix: pip install gradio>=3.36.0")
+from llmtuner import create_web_demo
 
 
 def main():
-    chat_model = WebChatModel()
-
-    with gr.Blocks(title="Web Demo") as demo:
-        lang = gr.Dropdown(choices=["en", "zh"], value="en")
-
-        _, _, _, chat_elems = create_chat_box(chat_model, visible=True)
-
-        manager = Manager([{"lang": lang}, chat_elems])
-
-        demo.load(manager.gen_label, [lang], [lang] + list(chat_elems.values()))
-
-        lang.change(manager.gen_label, [lang], [lang] + list(chat_elems.values()))
-
+    demo = create_web_demo()
     demo.queue()
     demo.launch(server_name="0.0.0.0", server_port=7860, share=False, inbrowser=True)