diff --git a/main.py b/main.py
index 10ff932..7480f82 100644
--- a/main.py
+++ b/main.py
@@ -1,60 +1,4 @@
-from typing import Annotated, Union
-
-from fastapi import FastAPI, Request, status, Form
-from fastapi.responses import JSONResponse
-
-from src.dotchain.runtime.interpreter import program_parser
-from src.dotchain.runtime.tokenizer import Tokenizer
-from src.dotchain.runtime.runtime import Runtime
-from src.blackbox.blackbox_factory import BlackboxFactory
 import uvicorn
-from fastapi.middleware.cors import CORSMiddleware
-from injector import Injector
-
-app = FastAPI()
-
-app.add_middleware(
-    CORSMiddleware,
-    allow_origins=["*"],
-    allow_credentials=True,
-    allow_methods=["*"],
-    allow_headers=["*"],
-)
-
-injector = Injector()
-blackbox_factory = injector.get(BlackboxFactory)
-
-@app.post("/")
-async def blackbox(blackbox_name: Union[str, None] = None, request: Request = None):
-    if not blackbox_name:
-        return await JSONResponse(content={"error": "blackbox_name is required"}, status_code=status.HTTP_400_BAD_REQUEST)
-    try:
-        box = blackbox_factory.create_blackbox(blackbox_name)
-    except ValueError:
-        return await JSONResponse(content={"error": "value error"}, status_code=status.HTTP_400_BAD_REQUEST)
-    return await box.fast_api_handler(request)
-
-def read_form_image(request: Request):
-    async def inner(field: str):
-        print(field)
-        return "image"
-    return inner
-
-def read_form_text(request: Request):
-    def inner(field: str):
-        print(field)
-        return "text"
-    return inner
-
-@app.post("/workflows")
-async def workflows(script: Annotated[str, Form()], request: Request=None):
-    dsl_runtime = Runtime(exteral_fun={"print": print, 
-                                       'read_form_image': read_form_image(request),
-                                       "read_form_text": read_form_text(request)})
-    t = Tokenizer()
-    t.init(script)
-    ast = program_parser(t)
-    ast.exec(dsl_runtime)
 
 if __name__ == "__main__":
-    uvicorn.run("main:app", host="0.0.0.0", port=8000, log_level="info")
+    uvicorn.run("router:app", host="0.0.0.0", port=8000, log_level="info")
diff --git a/router.py b/router.py
new file mode 100644
index 0000000..fc8c3fd
--- /dev/null
+++ b/router.py
@@ -0,0 +1,35 @@
+from typing import Annotated, Union
+
+from fastapi import FastAPI, Request, status, Form
+from fastapi.responses import JSONResponse
+
+from src.dotchain.runtime.interpreter import program_parser
+from src.dotchain.runtime.tokenizer import Tokenizer
+from src.dotchain.runtime.runtime import Runtime
+from src.blackbox.blackbox_factory import BlackboxFactory
+import uvicorn
+from fastapi.middleware.cors import CORSMiddleware
+from injector import Injector
+
+app = FastAPI()
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+injector = Injector()
+blackbox_factory = injector.get(BlackboxFactory)
+
+@app.post("/")
+async def blackbox(blackbox_name: Union[str, None] = None, request: Request = None):
+    if not blackbox_name:
+        return await JSONResponse(content={"error": "blackbox_name is required"}, status_code=status.HTTP_400_BAD_REQUEST)
+    try:
+        box = blackbox_factory.call_blackbox(blackbox_name)
+    except ValueError:
+        return await JSONResponse(content={"error": "value error"}, status_code=status.HTTP_400_BAD_REQUEST)
+    return await box.fast_api_handler(request)
diff --git a/src/blackbox/asr.py b/src/blackbox/asr.py
index ad7ca81..4f92659 100644
--- a/src/blackbox/asr.py
+++ b/src/blackbox/asr.py
@@ -7,7 +7,9 @@ from fastapi.responses import JSONResponse
 from ..asr.rapid_paraformer.utils import read_yaml
 from ..asr.rapid_paraformer import RapidParaformer
 from .blackbox import Blackbox
+from injector import singleton
 
+@singleton
 class ASR(Blackbox):
 
     def __init__(self, path = ".env.yaml") -> None:
diff --git a/src/blackbox/audio_chat.py b/src/blackbox/audio_chat.py
index 091c78e..cf5fb71 100644
--- a/src/blackbox/audio_chat.py
+++ b/src/blackbox/audio_chat.py
@@ -1,6 +1,6 @@
 from fastapi import Request, Response,status
 from fastapi.responses import JSONResponse
-from injector import inject
+from injector import inject, singleton
 
 from .asr import ASR
 from .tesou import Tesou
@@ -8,6 +8,7 @@ from .tts import TTS
 
 from .blackbox import Blackbox
 
+@singleton
 class AudioChat(Blackbox):
 
     @inject
diff --git a/src/blackbox/audio_to_text.py b/src/blackbox/audio_to_text.py
index f8a3e9e..ae16260 100644
--- a/src/blackbox/audio_to_text.py
+++ b/src/blackbox/audio_to_text.py
@@ -3,9 +3,10 @@ from fastapi.responses import JSONResponse
 import speech_recognition as sr
 import filetype
 import io
-
+from injector import singleton
 from .blackbox import Blackbox
 
+@singleton
 class AudioToText(Blackbox):
 
     def __call__(self, *args, **kwargs):
diff --git a/src/blackbox/blackbox_factory.py b/src/blackbox/blackbox_factory.py
index 79378d1..55ad618 100644
--- a/src/blackbox/blackbox_factory.py
+++ b/src/blackbox/blackbox_factory.py
@@ -9,8 +9,9 @@ from .tesou import Tesou
 from .fastchat import Fastchat
 from .g2e import G2E
 from .text_and_image import TextAndImage
-from injector import inject
+from injector import inject, singleton
 
+@singleton
 class BlackboxFactory:
     models = {}
 
@@ -40,7 +41,7 @@ class BlackboxFactory:
     def __call__(self, *args, **kwargs):
         return self.processing(*args, **kwargs)
 
-    def create_blackbox(self, blackbox_name: str) -> Blackbox:
+    def call_blackbox(self, blackbox_name: str) -> Blackbox:
         model = self.models.get(blackbox_name)
         if model is None:
             raise ValueError("Invalid blockbox type")
diff --git a/src/blackbox/blackbox_sentiment.py b/src/blackbox/emotion.py
similarity index 96%
rename from src/blackbox/blackbox_sentiment.py
rename to src/blackbox/emotion.py
index 0eb3103..4d2d060 100644
--- a/src/blackbox/blackbox_sentiment.py
+++ b/src/blackbox/emotion.py
@@ -6,8 +6,10 @@ from fastapi.responses import JSONResponse
 from .blackbox import Blackbox
 from lagent.llms.lmdepoly_wrapper import LMDeployClient
 from lagent.llms.meta_template import INTERNLM2_META as META
+from injector import singleton
 
-class Sentiment(Blackbox):
+@singleton
+class Emotion(Blackbox):
 
     def __init__(self, model_name, model_url) -> None:
         self.model = LMDeployClient(
diff --git a/src/blackbox/fastchat.py b/src/blackbox/fastchat.py
index 94af2b1..27c95c1 100755
--- a/src/blackbox/fastchat.py
+++ b/src/blackbox/fastchat.py
@@ -7,6 +7,8 @@ from .blackbox import Blackbox
 import requests
 import json
 
+from injector import singleton
+@singleton
 class Fastchat(Blackbox):
     
     def __call__(self, *args, **kwargs):
diff --git a/src/blackbox/g2e.py b/src/blackbox/g2e.py
index 84f9e90..8bd5507 100755
--- a/src/blackbox/g2e.py
+++ b/src/blackbox/g2e.py
@@ -7,7 +7,8 @@ from .blackbox import Blackbox
 import requests
 import json
 from openai import OpenAI
-
+from injector import singleton
+@singleton
 class G2E(Blackbox):
     
     def __call__(self, *args, **kwargs):
diff --git a/src/blackbox/sentiment.py b/src/blackbox/sentiment.py
index d17af4c..0e60af7 100644
--- a/src/blackbox/sentiment.py
+++ b/src/blackbox/sentiment.py
@@ -6,7 +6,8 @@ from fastapi.responses import JSONResponse
 from ..sentiment_engine.sentiment_engine import SentimentEngine
 from .blackbox import Blackbox
 
-
+from injector import singleton
+@singleton
 class Sentiment(Blackbox):
 
     def __init__(self) -> None:
diff --git a/src/blackbox/tesou.py b/src/blackbox/tesou.py
index a262c21..a8f88bc 100755
--- a/src/blackbox/tesou.py
+++ b/src/blackbox/tesou.py
@@ -7,7 +7,9 @@ from ..configuration import TesouConf
 from .blackbox import Blackbox
 
 import requests
+from injector import singleton
 
+@singleton
 class Tesou(Blackbox):
     url: str
 
diff --git a/src/blackbox/text_and_image.py b/src/blackbox/text_and_image.py
index c63fdf6..ce87987 100644
--- a/src/blackbox/text_and_image.py
+++ b/src/blackbox/text_and_image.py
@@ -4,7 +4,8 @@ from fastapi import Request, Response, status
 from fastapi.responses import JSONResponse
 from .blackbox import Blackbox
 
-
+from injector import singleton
+@singleton
 class TextAndImage(Blackbox):
     
     def __call__(self, *args, **kwargs):
diff --git a/src/blackbox/text_to_audio.py b/src/blackbox/text_to_audio.py
index 561a0c0..196b28c 100644
--- a/src/blackbox/text_to_audio.py
+++ b/src/blackbox/text_to_audio.py
@@ -3,7 +3,8 @@ from fastapi.responses import JSONResponse
 from .blackbox import Blackbox
 from gtts import gTTS
 from io import BytesIO
-
+from injector import singleton
+@singleton
 class TextToAudio(Blackbox):
     
     def __call__(self, *args, **kwargs):
diff --git a/src/blackbox/tts.py b/src/blackbox/tts.py
index 669f273..f05c082 100644
--- a/src/blackbox/tts.py
+++ b/src/blackbox/tts.py
@@ -6,7 +6,9 @@ from fastapi import Request, Response, status
 from fastapi.responses import JSONResponse
 from .blackbox import Blackbox
 from ..tts.tts_service import TTService
+from injector import singleton
 
+@singleton
 class TTS(Blackbox):
 
     def __init__(self, *args, **kwargs) -> None: