diff --git a/README.md b/README.md
index a583764..74b4bca 100644
--- a/README.md
+++ b/README.md
@@ -23,9 +23,7 @@
 ## 声明
 
 1. 本项目遵循 [MIT开源协议](/LICENSE)，主要用于技术研究和学习，使用本项目时需遵守所在地法律法规、相关政策以及企业章程，禁止用于任何违法或侵犯他人权益的行为。任何个人、团队和企业，无论以何种方式使用该项目、对何对象提供服务，所产生的一切后果，本项目均不承担任何责任
-2. 境内使用该项目时，推荐使用国内厂商的大模型服务，并进行必要的内容安全审核及过滤
-3. 本项目当前主要接入协同办公平台，推荐使用飞书、钉钉、企微自建应用、网页、公众号等接入通道，其他通道持续扩展中，欢迎贡献代码或提交反馈
-4. 成本与安全：Agent模式下Token使用量高于普通对话模式，请根据效果及成本综合选择模型。Agent具有访问所在操作系统的能力，请谨慎选择项目部署环境。同时项目也会持续升级安全机制、并降低模型消耗成本
+2. 成本与安全：Agent模式下Token使用量高于普通对话模式，请根据效果及成本综合选择模型。Agent具有访问所在操作系统的能力，请谨慎选择项目部署环境。同时项目也会持续升级安全机制、并降低模型消耗成本
 
 ## 演示
 
diff --git a/agent/protocol/agent_stream.py b/agent/protocol/agent_stream.py
index 52a2fa9..4d516d8 100644
--- a/agent/protocol/agent_stream.py
+++ b/agent/protocol/agent_stream.py
@@ -5,7 +5,7 @@ Provides streaming output, event system, and complete tool-call loop
 """
 import json
 import time
-from typing import List, Dict, Any, Optional, Callable
+from typing import List, Dict, Any, Optional, Callable, Tuple
 
 from agent.protocol.models import LLMRequest, LLMModel
 from agent.tools.base_tool import BaseTool, ToolResult
@@ -84,7 +84,7 @@ class AgentStreamExecutor:
         args_str = json.dumps(args, sort_keys=True, ensure_ascii=False)
         return hashlib.md5(args_str.encode()).hexdigest()[:8]
     
-    def _check_consecutive_failures(self, tool_name: str, args: dict) -> tuple[bool, str, bool]:
+    def _check_consecutive_failures(self, tool_name: str, args: dict) -> Tuple[bool, str, bool]:
         """
         Check if tool has failed too many times consecutively or called repeatedly with same args
         
@@ -456,7 +456,7 @@ class AgentStreamExecutor:
 
         return final_response
 
-    def _call_llm_stream(self, retry_on_empty=True, retry_count=0, max_retries=3) -> tuple[str, List[Dict]]:
+    def _call_llm_stream(self, retry_on_empty=True, retry_count=0, max_retries=3) -> Tuple[str, List[Dict]]:
         """
         Call LLM with streaming and automatic retry on errors
         
diff --git a/agent/tools/utils/truncate.py b/agent/tools/utils/truncate.py
index 1b0c1e0..c2ed0f6 100644
--- a/agent/tools/utils/truncate.py
+++ b/agent/tools/utils/truncate.py
@@ -8,7 +8,7 @@ Truncation is based on two independent limits - whichever is hit first wins:
 Never returns partial lines (except bash tail truncation edge case).
 """
 
-from typing import Dict, Any, Optional, Literal
+from typing import Dict, Any, Optional, Literal, Tuple
 
 
 DEFAULT_MAX_LINES = 2000
@@ -278,7 +278,7 @@ def _truncate_string_to_bytes_from_end(text: str, max_bytes: int) -> str:
     return encoded[start:].decode('utf-8', errors='ignore')
 
 
-def truncate_line(line: str, max_chars: int = GREP_MAX_LINE_LENGTH) -> tuple[str, bool]:
+def truncate_line(line: str, max_chars: int = GREP_MAX_LINE_LENGTH) -> Tuple[str, bool]:
     """
     Truncate single line to max characters, add [truncated] suffix.
     Used for grep match lines.