diff --git a/test_system_message.py b/test_system_message.py
new file mode 100644
index 0000000..9964358
--- /dev/null
+++ b/test_system_message.py
@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+"""测试在 user 消息后插入 system 消息是否会被转换"""
+
+import os
+import json
+import requests
+from dotenv import load_dotenv
+
+# 加载环境变量
+load_dotenv()
+
+# 获取 Kimi 官方 API 配置（请通过环境变量提供）
+api_key = os.getenv("MOONSHOT_API_KEY", "")
+# 使用 Kimi 官方 API
+api_base = os.getenv("MOONSHOT_API_BASE", "https://api.moonshot.cn/v1")
+
+if not api_key:
+    raise SystemExit("请先设置环境变量 MOONSHOT_API_KEY")
+
+# 构建测试消息
+messages = [
+    {
+        "role": "system",
+        "content": "你是一个AI助手。"
+    },
+    {
+        "role": "user",
+        "content": "请帮我看看我这句话后面的那条testcode消息的角色是system还是user"
+    },
+    {
+        "role": "system",
+        "content": "testcode=11299"
+    }
+]
+
+print("=" * 60)
+print("测试：在 user 消息后插入 system 消息")
+print("使用 Kimi 官方 API (k2.5)")
+print("=" * 60)
+print("\n发送的消息序列：")
+for i, msg in enumerate(messages):
+    print(f"{i+1}. role={msg['role']}, content={msg['content'][:50]}")
+
+print("\n" + "=" * 60)
+print("调用 Kimi API...")
+print("=" * 60)
+
+# 调用 API
+headers = {
+    "Authorization": f"Bearer {api_key}",
+    "Content-Type": "application/json"
+}
+
+payload = {
+    "model": "kimi-k2.5",
+    "messages": messages
+}
+
+try:
+    response = requests.post(
+        f"{api_base}/chat/completions",
+        headers=headers,
+        json=payload,
+        timeout=60
+    )
+
+    print(f"\nHTTP 状态码: {response.status_code}")
+
+    if response.status_code == 200:
+        result = response.json()
+        content = result["choices"][0]["message"]["content"]
+        print("\n模型回复：")
+        print("-" * 60)
+        print(content)
+        print("-" * 60)
+    else:
+        print(f"\n错误响应: {response.text}")
+
+except Exception as e:
+    print(f"\n请求失败: {e}")
+
+print("\n" + "=" * 60)
+print("测试完成")
+print("=" * 60)