diff --git a/chattool/__init__.py b/chattool/__init__.py
index 29e94bb..fc3cd50 100644
--- a/chattool/__init__.py
+++ b/chattool/__init__.py
@@ -2,7 +2,7 @@
 
 __author__ = """Rex Wang"""
 __email__ = '1073853456@qq.com'
-__version__ = '3.3.2'
+__version__ = '3.3.3'
 
 import os, sys, requests, json
 from .chattype import Chat, Resp
diff --git a/chattool/chattype.py b/chattool/chattype.py
index 739e367..fa06d8c 100644
--- a/chattool/chattype.py
+++ b/chattool/chattype.py
@@ -398,14 +398,26 @@ def get_valid_models(self, gpt_only:bool=True)->List[str]:
             model_url = os.path.join(self.base_url, 'v1/models')
         return valid_models(self.api_key, model_url, gpt_only=gpt_only)
 
-    def get_curl(self, **options):
-        """Print the curl command"""
+    def get_curl(self, use_env_key:bool=False, **options):
+        """Get the curl command
+        
+        Args:
+            use_env_key (bool, optional): whether to replace the API key with environment variable. Defaults to False.
+        
+        Returns:
+            str: curl command
+        """
         options = self._init_options(**options)
         api_key, chat_log, chat_url = self.api_key, self.chat_log, self.chat_url
+        if use_env_key: api_key = '$OPENAI_API_KEY'
         return curl_cmd_of_chat_completion(api_key, chat_url, chat_log, **options)
     
     def print_curl(self, **options):
-        """Print the curl command"""
+        """Print the curl command
+        
+        Args:
+            use_env_key (bool, optional): whether to use the environment key. Defaults to False.
+        """
         print(self.get_curl(**options))
     
     # Part5: properties and setters
diff --git a/chattool/request.py b/chattool/request.py
index 37301d8..d88ed7a 100644
--- a/chattool/request.py
+++ b/chattool/request.py
@@ -110,7 +110,7 @@ def curl_cmd_of_chat_completion( api_key:str
     }
     curl_cmd += f"\n    -H 'Content-Type: application/json' \\"
     curl_cmd += f"\n    -H 'Authorization: Bearer {api_key}' \\"
-    curl_cmd += f"\n    -d '{json.dumps(payload, indent=4)}' \\"
+    curl_cmd += f"\n    -d '{json.dumps(payload, indent=4, ensure_ascii=False)}' \\"
     if isinstance(timeout, int) and timeout > 0:
         curl_cmd += f"\n    --max-time {timeout} \\"
     return curl_cmd.rstrip(" \\")
diff --git a/setup.py b/setup.py
index 5a62168..ec36d53 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 with open('README.md') as readme_file:
     readme = readme_file.read()
 
-VERSION = '3.3.2'
+VERSION = '3.3.3'
 
 requirements = [
     'Click>=7.0', 'requests>=2.20', "responses>=0.23", 'aiohttp>=3.8',
diff --git a/tests/test_curlcmd.py b/tests/test_curlcmd.py
index 2f2c14d..c5dd078 100644
--- a/tests/test_curlcmd.py
+++ b/tests/test_curlcmd.py
@@ -27,7 +27,7 @@ def add(a: int, b: int) -> int:
 def test_tool_call():
     chat = Chat()
     chat.user("find the sum of 784359345 and 345345345")
-    chat.print_curl()
+    chat.print_curl(use_env_key=True)
     chat.settools([add])
     chat.print_curl()
     chat.tool_type = 'function_call'