diff --git a/2025.12.15_langchain_tools_test/.env b/2025.12.15_langchain_tools_test/.env
new file mode 100644
index 0000000..6321e48
--- /dev/null
+++ b/2025.12.15_langchain_tools_test/.env
@@ -0,0 +1,2 @@
+OPENAI_API_KEY=xxx
+DASHSCOPE_BASE_URL=https://dashscope.aliyuncs.com/compatible-mode/v1
\ No newline at end of file
diff --git a/2025.12.15_langchain_tools_test/langchain_tools_test.py b/2025.12.15_langchain_tools_test/langchain_tools_test.py
new file mode 100644
index 0000000..379007a
--- /dev/null
+++ b/2025.12.15_langchain_tools_test/langchain_tools_test.py
@@ -0,0 +1,66 @@
+import guan
+from langchain_core.tools import tool
+
+@tool
+def add_numbers_1(a, b):
+    """将两个数字相加"""
+    return str(a + b + 0.1)+'\n'
+
+@tool
+def add_numbers_2(a, b):
+    """将两个数字相加"""
+    return str(a + b + 0.0001)+'\n'
+
+@tool
+def subtract_numbers(a, b):
+    """将两个数字相减"""
+    return str(a - b)+'\n'
+
+@tool
+def guan_operator(a, b):
+    """ """
+    return str(a*b)+'\n'
+
+@tool
+def other_operators_1(a, b):
+    """A 操作"""
+    return str(a*b+0.1)+'\n'
+
+@tool
+def other_operators_2(a, b):
+    """#号注释测试"""
+    return str(a*b+0.2)+'\n' # B 操作
+
+@tool
+def other_operators_3(a, b):
+    """变量名测试"""
+    C_operation = str(a*b+0.3)+'\n'
+    return C_operation
+
+guan.langchain_chat_with_tools(prompt='计算 3+2', temperature=0.0, tools=[add_numbers_1])
+print('\n\n---\n')
+guan.langchain_chat_with_tools(prompt='计算 3+2。用工具里的返回结果作为最终结果。', temperature=0.0, tools=[add_numbers_1])
+
+print('\n\n---分割线---\n')
+
+guan.langchain_chat_with_tools(prompt='计算 3+2', temperature=0.0, tools=[add_numbers_2])
+print('\n\n---\n')
+guan.langchain_chat_with_tools(prompt='计算 3+2。用工具里的返回结果作为最终结果。', temperature=0.0, tools=[add_numbers_2])
+
+print('\n\n---分割线---\n')
+
+guan.langchain_chat_with_tools(prompt='计算 3+2', temperature=0.0, tools=[subtract_numbers])
+print('\n\n---\n')
+guan.langchain_chat_with_tools(prompt='计算 3+2。用工具里的返回结果作为最终结果。', temperature=0.0, tools=[subtract_numbers])
+
+print('\n\n---分割线---\n')
+
+all_tools = [add_numbers_1, add_numbers_2, subtract_numbers, subtract_numbers, other_operators_3, other_operators_2,  other_operators_1, guan_operator]
+
+guan.langchain_chat_with_tools(prompt='对 3 和 2 进行 Guan 操作', temperature=0.0, tools=all_tools)
+print('\n\n---\n')
+guan.langchain_chat_with_tools(prompt='对 3 和 2 进行 A 操作', temperature=0.0, tools=all_tools)
+print('\n\n---\n')
+guan.langchain_chat_with_tools(prompt='对 3 和 2 进行 B 操作', temperature=0.0, tools=all_tools)
+print('\n\n---\n')
+guan.langchain_chat_with_tools(prompt='对 3 和 2 进行 C 操作', temperature=0.0, tools=all_tools)
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