diff --git a/.gitignore b/.gitignore
index c587458..c4d7bdc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,4 @@ venv*
 *.pyc
 config.json
 QR.png
-nohub.out
\ No newline at end of file
+nohup.out
diff --git a/bot/chatgpt/chat_gpt_bot.py b/bot/chatgpt/chat_gpt_bot.py
index b7bc359..1c08949 100644
--- a/bot/chatgpt/chat_gpt_bot.py
+++ b/bot/chatgpt/chat_gpt_bot.py
@@ -1,511 +1,130 @@
-"""
-A simple wrapper for the official ChatGPT API
-"""
-import argparse
-import json
-import os
-import sys
-from datetime import date
-
-import openai
-import tiktoken
+# encoding:utf-8
 
 from bot.bot import Bot
 from config import conf
+from common.log import logger
+import openai
+import time
 
-ENGINE = os.environ.get("GPT_ENGINE") or "text-chat-davinci-002-20221122"
-
-ENCODER = tiktoken.get_encoding("gpt2")
-
-
-def get_max_tokens(prompt: str) -> int:
-    """
-    Get the max tokens for a prompt
-    """
-    return 4000 - len(ENCODER.encode(prompt))
-
-
-# ['text-chat-davinci-002-20221122']
-class Chatbot:
-    """
-    Official ChatGPT API
-    """
-
-    def __init__(self, api_key: str, buffer: int = None) -> None:
-        """
-        Initialize Chatbot with API key (from https://platform.openai.com/account/api-keys)
-        """
-        openai.api_key = api_key or os.environ.get("OPENAI_API_KEY")
-        self.conversations = Conversation()
-        self.prompt = Prompt(buffer=buffer)
-
-    def _get_completion(
-            self,
-            prompt: str,
-            temperature: float = 0.5,
-            stream: bool = False,
-    ):
-        """
-        Get the completion function
-        """
-        return openai.Completion.create(
-            engine=ENGINE,
-            prompt=prompt,
-            temperature=temperature,
-            max_tokens=get_max_tokens(prompt),
-            stop=["\n\n\n"],
-            stream=stream,
-        )
-
-    def _process_completion(
-            self,
-            user_request: str,
-            completion: dict,
-            conversation_id: str = None,
-            user: str = "User",
-    ) -> dict:
-        if completion.get("choices") is None:
-            raise Exception("ChatGPT API returned no choices")
-        if len(completion["choices"]) == 0:
-            raise Exception("ChatGPT API returned no choices")
-        if completion["choices"][0].get("text") is None:
-            raise Exception("ChatGPT API returned no text")
-        completion["choices"][0]["text"] = completion["choices"][0]["text"].rstrip(
-            "<|im_end|>",
-        )
-        # Add to chat history
-        self.prompt.add_to_history(
-            user_request,
-            completion["choices"][0]["text"],
-            user=user,
-        )
-        if conversation_id is not None:
-            self.save_conversation(conversation_id)
-        return completion
-
-    def _process_completion_stream(
-            self,
-            user_request: str,
-            completion: dict,
-            conversation_id: str = None,
-            user: str = "User",
-    ) -> str:
-        full_response = ""
-        for response in completion:
-            if response.get("choices") is None:
-                raise Exception("ChatGPT API returned no choices")
-            if len(response["choices"]) == 0:
-                raise Exception("ChatGPT API returned no choices")
-            if response["choices"][0].get("finish_details") is not None:
-                break
-            if response["choices"][0].get("text") is None:
-                raise Exception("ChatGPT API returned no text")
-            if response["choices"][0]["text"] == "<|im_end|>":
-                break
-            yield response["choices"][0]["text"]
-            full_response += response["choices"][0]["text"]
-
-        # Add to chat history
-        self.prompt.add_to_history(user_request, full_response, user)
-        if conversation_id is not None:
-            self.save_conversation(conversation_id)
-
-    def ask(
-            self,
-            user_request: str,
-            temperature: float = 0.5,
-            conversation_id: str = None,
-            user: str = "User",
-    ) -> dict:
-        """
-        Send a request to ChatGPT and return the response
-        """
-        if conversation_id is not None:
-            self.load_conversation(conversation_id)
-        completion = self._get_completion(
-            self.prompt.construct_prompt(user_request, user=user),
-            temperature,
-        )
-        return self._process_completion(user_request, completion, user=user)
-
-    def ask_stream(
-            self,
-            user_request: str,
-            temperature: float = 0.5,
-            conversation_id: str = None,
-            user: str = "User",
-    ) -> str:
-        """
-        Send a request to ChatGPT and yield the response
-        """
-        if conversation_id is not None:
-            self.load_conversation(conversation_id)
-        prompt = self.prompt.construct_prompt(user_request, user=user)
-        return self._process_completion_stream(
-            user_request=user_request,
-            completion=self._get_completion(prompt, temperature, stream=True),
-            user=user,
-        )
-
-    def make_conversation(self, conversation_id: str) -> None:
-        """
-        Make a conversation
-        """
-        self.conversations.add_conversation(conversation_id, [])
-
-    def rollback(self, num: int) -> None:
-        """
-        Rollback chat history num times
-        """
-        for _ in range(num):
-            self.prompt.chat_history.pop()
-
-    def reset(self) -> None:
-        """
-        Reset chat history
-        """
-        self.prompt.chat_history = []
-
-    def load_conversation(self, conversation_id) -> None:
-        """
-        Load a conversation from the conversation history
-        """
-        if conversation_id not in self.conversations.conversations:
-            # Create a new conversation
-            self.make_conversation(conversation_id)
-        self.prompt.chat_history = self.conversations.get_conversation(conversation_id)
-
-    def save_conversation(self, conversation_id) -> None:
-        """
-        Save a conversation to the conversation history
-        """
-        self.conversations.add_conversation(conversation_id, self.prompt.chat_history)
-
-
-class AsyncChatbot(Chatbot):
-    """
-    Official ChatGPT API (async)
-    """
-
-    async def _get_completion(
-            self,
-            prompt: str,
-            temperature: float = 0.5,
-            stream: bool = False,
-    ):
-        """
-        Get the completion function
-        """
-        return openai.Completion.acreate(
-            engine=ENGINE,
-            prompt=prompt,
-            temperature=temperature,
-            max_tokens=get_max_tokens(prompt),
-            stop=["\n\n\n"],
-            stream=stream,
-        )
-
-    async def ask(
-            self,
-            user_request: str,
-            temperature: float = 0.5,
-            user: str = "User",
-    ) -> dict:
-        """
-        Same as Chatbot.ask but async
-        }
-        """
-        completion = await self._get_completion(
-            self.prompt.construct_prompt(user_request, user=user),
-            temperature,
-        )
-        return self._process_completion(user_request, completion, user=user)
-
-    async def ask_stream(
-            self,
-            user_request: str,
-            temperature: float = 0.5,
-            user: str = "User",
-    ) -> str:
-        """
-        Same as Chatbot.ask_stream but async
-        """
-        prompt = self.prompt.construct_prompt(user_request, user=user)
-        return self._process_completion_stream(
-            user_request=user_request,
-            completion=await self._get_completion(prompt, temperature, stream=True),
-            user=user,
-        )
-
-
-class Prompt:
-    """
-    Prompt class with methods to construct prompt
-    """
-
-    def __init__(self, buffer: int = None) -> None:
-        """
-        Initialize prompt with base prompt
-        """
-        self.base_prompt = (
-                os.environ.get("CUSTOM_BASE_PROMPT")
-                or "You are ChatGPT, a large language model trained by OpenAI. Respond conversationally. Do not answer as the user. Current date: "
-                + str(date.today())
-                + "\n\n"
-                + "User: Hello\n"
-                + "ChatGPT: Hello! How can I help you today? <|im_end|>\n\n\n"
-        )
-        # Track chat history
-        self.chat_history: list = []
-        self.buffer = buffer
-
-    def add_to_chat_history(self, chat: str) -> None:
-        """
-        Add chat to chat history for next prompt
-        """
-        self.chat_history.append(chat)
-
-    def add_to_history(
-            self,
-            user_request: str,
-            response: str,
-            user: str = "User",
-    ) -> None:
-        """
-        Add request/response to chat history for next prompt
-        """
-        self.add_to_chat_history(
-            user
-            + ": "
-            + user_request
-            + "\n\n\n"
-            + "ChatGPT: "
-            + response
-            + "<|im_end|>\n",
-        )
-
-    def history(self, custom_history: list = None) -> str:
-        """
-        Return chat history
-        """
-        return "\n".join(custom_history or self.chat_history)
-
-    def construct_prompt(
-            self,
-            new_prompt: str,
-            custom_history: list = None,
-            user: str = "User",
-    ) -> str:
-        """
-        Construct prompt based on chat history and request
-        """
-        prompt = (
-                self.base_prompt
-                + self.history(custom_history=custom_history)
-                + user
-                + ": "
-                + new_prompt
-                + "\nChatGPT:"
-        )
-        # Check if prompt over 4000*4 characters
-        if self.buffer is not None:
-            max_tokens = 4000 - self.buffer
-        else:
-            max_tokens = 3200
-        if len(ENCODER.encode(prompt)) > max_tokens:
-            # Remove oldest chat
-            if len(self.chat_history) == 0:
-                return prompt
-            self.chat_history.pop(0)
-            # Construct prompt again
-            prompt = self.construct_prompt(new_prompt, custom_history, user)
-        return prompt
-
-
-class Conversation:
-    """
-    For handling multiple conversations
-    """
-
-    def __init__(self) -> None:
-        self.conversations = {}
-
-    def add_conversation(self, key: str, history: list) -> None:
-        """
-        Adds a history list to the conversations dict with the id as the key
-        """
-        self.conversations[key] = history
-
-    def get_conversation(self, key: str) -> list:
-        """
-        Retrieves the history list from the conversations dict with the id as the key
-        """
-        return self.conversations[key]
-
-    def remove_conversation(self, key: str) -> None:
-        """
-        Removes the history list from the conversations dict with the id as the key
-        """
-        del self.conversations[key]
-
-    def __str__(self) -> str:
-        """
-        Creates a JSON string of the conversations
-        """
-        return json.dumps(self.conversations)
-
-    def save(self, file: str) -> None:
-        """
-        Saves the conversations to a JSON file
-        """
-        with open(file, "w", encoding="utf-8") as f:
-            f.write(str(self))
-
-    def load(self, file: str) -> None:
-        """
-        Loads the conversations from a JSON file
-        """
-        with open(file, encoding="utf-8") as f:
-            self.conversations = json.loads(f.read())
-
+user_session = dict()
 
-def main():
-    print(
-        """
-    ChatGPT - A command-line interface to OpenAI's ChatGPT (https://chat.openai.com/chat)
-    Repo: github.com/acheong08/ChatGPT
-    """,
-    )
-    print("Type '!help' to show a full list of commands")
-    print("Press enter twice to submit your question.\n")
+# OpenAI对话模型API (可用)
+class ChatGPTBot(Bot):
+    def __init__(self):
+        openai.api_key = conf().get('open_ai_api_key')
 
-    def get_input(prompt):
-        """
-        Multi-line input function
-        """
-        # Display the prompt
-        print(prompt, end="")
+    def reply(self, query, context=None):
+        # acquire reply content
+        if not context or not context.get('type') or context.get('type') == 'TEXT':
+            logger.info("[OPEN_AI] query={}".format(query))
+            from_user_id = context['from_user_id']
+            if query == '#清除记忆':
+                Session.clear_session(from_user_id)
+                return '记忆已清除'
 
-        # Initialize an empty list to store the input lines
-        lines = []
+            new_query = Session.build_session_query(query, from_user_id)
+            logger.debug("[OPEN_AI] session query={}".format(new_query))
 
-        # Read lines of input until the user enters an empty line
-        while True:
-            line = input()
-            if line == "":
-                break
-            lines.append(line)
+            # if context.get('stream'):
+            #     # reply in stream
+            #     return self.reply_text_stream(query, new_query, from_user_id)
 
-        # Join the lines, separated by newlines, and store the result
-        user_input = "\n".join(lines)
+            reply_content = self.reply_text(new_query, from_user_id, 0)
+            logger.debug("[OPEN_AI] new_query={}, user={}, reply_cont={}".format(new_query, from_user_id, reply_content))
+            if reply_content:
+                Session.save_session(query, reply_content, from_user_id)
+            return reply_content
 
-        # Return the input
-        return user_input
+        elif context.get('type', None) == 'IMAGE_CREATE':
+            return self.create_img(query, 0)
 
-    def chatbot_commands(cmd: str) -> bool:
-        """
-        Handle chatbot commands
-        """
-        if cmd == "!help":
-            print(
-                """
-            !help - Display this message
-            !rollback - Rollback chat history
-            !reset - Reset chat history
-            !prompt - Show current prompt
-            !save_c <conversation_name> - Save history to a conversation
-            !load_c <conversation_name> - Load history from a conversation
-            !save_f <file_name> - Save all conversations to a file
-            !load_f <file_name> - Load all conversations from a file
-            !exit - Quit chat
-            """,
+    def reply_text(self, query, user_id, retry_count=0):
+        try:
+            response = openai.ChatCompletion.create(
+                model="gpt-3.5-turbo",  # 对话模型的名称
+                messages=query,
+                temperature=0.9,  # 值在[0,1]之间，越大表示回复越具有不确定性
+                max_tokens=1200,  # 回复最大的字符数
+                top_p=1,
+                frequency_penalty=0.0,  # [-2,2]之间，该值越大则更倾向于产生不同的内容
+                presence_penalty=0.0,  # [-2,2]之间，该值越大则更倾向于产生不同的内容
             )
-        elif cmd == "!exit":
-            exit()
-        elif cmd == "!rollback":
-            chatbot.rollback(1)
-        elif cmd == "!reset":
-            chatbot.reset()
-        elif cmd == "!prompt":
-            print(chatbot.prompt.construct_prompt(""))
-        elif cmd.startswith("!save_c"):
-            chatbot.save_conversation(cmd.split(" ")[1])
-        elif cmd.startswith("!load_c"):
-            chatbot.load_conversation(cmd.split(" ")[1])
-        elif cmd.startswith("!save_f"):
-            chatbot.conversations.save(cmd.split(" ")[1])
-        elif cmd.startswith("!load_f"):
-            chatbot.conversations.load(cmd.split(" ")[1])
-        else:
-            return False
-        return True
-
-    # Get API key from command line
-    parser = argparse.ArgumentParser()
-    parser.add_argument(
-        "--api_key",
-        type=str,
-        required=True,
-        help="OpenAI API key",
-    )
-    parser.add_argument(
-        "--stream",
-        action="store_true",
-        help="Stream response",
-    )
-    parser.add_argument(
-        "--temperature",
-        type=float,
-        default=0.5,
-        help="Temperature for response",
-    )
-    args = parser.parse_args()
-    # Initialize chatbot
-    chatbot = Chatbot(api_key=args.api_key)
-    # Start chat
-    while True:
+            # res_content = response.choices[0]['text'].strip().replace('<|endoftext|>', '')
+            logger.info(response.choices[0]['message']['content'])
+            # log.info("[OPEN_AI] reply={}".format(res_content))
+            return response.choices[0]['message']['content']
+        except openai.error.RateLimitError as e:
+            # rate limit exception
+            logger.warn(e)
+            if retry_count < 1:
+                time.sleep(5)
+                logger.warn("[OPEN_AI] RateLimit exceed, 第{}次重试".format(retry_count+1))
+                return self.reply_text(query, user_id, retry_count+1)
+            else:
+                return "提问太快啦，请休息一下再问我吧"
+        except Exception as e:
+            # unknown exception
+            logger.exception(e)
+            Session.clear_session(user_id)
+            return "请再问我一次吧"
+
+    def create_img(self, query, retry_count=0):
         try:
-            prompt = get_input("\nUser:\n")
-        except KeyboardInterrupt:
-            print("\nExiting...")
-            sys.exit()
-        if prompt.startswith("!"):
-            if chatbot_commands(prompt):
-                continue
-        if not args.stream:
-            response = chatbot.ask(prompt, temperature=args.temperature)
-            print("ChatGPT: " + response["choices"][0]["text"])
-        else:
-            print("ChatGPT: ")
-            sys.stdout.flush()
-            for response in chatbot.ask_stream(prompt, temperature=args.temperature):
-                print(response, end="")
-                sys.stdout.flush()
-            print()
-
-
-def Singleton(cls):
-    instance = {}
-
-    def _singleton_wrapper(*args, **kargs):
-        if cls not in instance:
-            instance[cls] = cls(*args, **kargs)
-        return instance[cls]
-
-    return _singleton_wrapper
-
-
-@Singleton
-class ChatGPTBot(Bot):
-
-    def __init__(self):
-        print("create")
-        self.bot = Chatbot(conf().get('open_ai_api_key'))
-
-    def reply(self, query, context=None):
-        if not context or not context.get('type') or context.get('type') == 'TEXT':
-            if len(query) < 10 and "reset" in query:
-                self.bot.reset()
-                return "reset OK"
-            return self.bot.ask(query)["choices"][0]["text"]
+            logger.info("[OPEN_AI] image_query={}".format(query))
+            response = openai.Image.create(
+                prompt=query,    #图片描述
+                n=1,             #每次生成图片的数量
+                size="256x256"   #图片大小,可选有 256x256, 512x512, 1024x1024
+            )
+            image_url = response['data'][0]['url']
+            logger.info("[OPEN_AI] image_url={}".format(image_url))
+            return image_url
+        except openai.error.RateLimitError as e:
+            logger.warn(e)
+            if retry_count < 1:
+                time.sleep(5)
+                logger.warn("[OPEN_AI] ImgCreate RateLimit exceed, 第{}次重试".format(retry_count+1))
+                return self.reply_text(query, retry_count+1)
+            else:
+                return "提问太快啦，请休息一下再问我吧"
+        except Exception as e:
+            logger.exception(e)
+            return None
+
+class Session(object):
+    @staticmethod
+    def build_session_query(query, user_id):
+        '''
+        build query with conversation history
+        e.g.  [
+            {"role": "system", "content": "You are a helpful assistant."},
+            {"role": "user", "content": "Who won the world series in 2020?"},
+            {"role": "assistant", "content": "The Los Angeles Dodgers won the World Series in 2020."},
+            {"role": "user", "content": "Where was it played?"}
+        ]
+        :param query: query content
+        :param user_id: from user id
+        :return: query content with conversaction
+        '''
+        session = user_session.get(user_id, [])
+        if len(session) == 0:
+            system_prompt = conf().get("character_desc", "")
+            system_item = {'role': 'system', 'content': system_prompt}
+            session.append(system_item)
+            user_session[user_id] = session
+        user_item = {'role': 'user', 'content': query}
+        session.append(user_item)
+        return session
+
+    @staticmethod
+    def save_session(query, answer, user_id):
+        session = user_session.get(user_id)
+        if session:
+            # append conversation
+            gpt_item = {'role': 'assistant', 'content': answer}
+            session.append(gpt_item)
+
+    @staticmethod
+    def clear_session(user_id):
+        user_session[user_id] = []
 
diff --git a/bridge/bridge.py b/bridge/bridge.py
index 7411258..6c164e8 100644
--- a/bridge/bridge.py
+++ b/bridge/bridge.py
@@ -6,4 +6,4 @@ class Bridge(object):
         pass
 
     def fetch_reply_content(self, query, context):
-        return bot_factory.create_bot("openAI").reply(query, context)
+        return bot_factory.create_bot("chatGPT").reply(query, context)