获取的数据为什么是错的？螺纹半夜三点还有K线数据

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
获取SHFE.rb2605的5分钟K线数据示例
"""
 import time
import pandas as pd
from tqsdk import TqApi, TqAuth
 def get_5min_kline():
    """
    获取SHFE.rb2605的5分钟K线数据
    """
    print("开始获取SHFE.rb2605的5分钟K线数据...")
         try:
        # 创建TqApi实例，使用指定的账号和密码
        print("正在连接TqSdk...")
        api = TqApi(auth=TqAuth("", ""))
        print("连接TqSdk成功！")
                 # 定义合约代码
        contract = "SHFE.rb2605"
        # 定义K线周期（5分钟 = 300秒）
        duration_seconds = 5 * 60
        # 定义获取的K线数量
        data_length = 100
                 print(f"正在获取 {contract} 的5分钟K线数据...")
        print(f"K线周期: 5分钟，获取数量: {data_length}根")
                 # 获取K线数据
        kline = api.get_kline_serial(contract, duration_seconds, data_length=data_length)
        print("成功创建K线对象")
                 # 等待数据加载
        print("等待数据加载...")
        start_time = time.time()
        if api.wait_update(deadline=start_time + 60):
            print(f"数据加载完成，耗时: {time.time() - start_time:.2f}秒")
            print(f"成功获取 {len(kline)} 条K线数据")
                         # 转换为DataFrame
            df = pd.DataFrame({
                "datetime": kline["datetime"],
                "open": kline["open"],
                "high": kline["high"],
                "low": kline["low"],
                "close": kline["close"],
                "volume": kline["volume"]
            })
                         # 转换时间戳为可读格式
            df["datetime"] = pd.to_datetime(df["datetime"], unit="ns")
                         # 打印前5条数据
            print("\n前5条K线数据:")
            print(df.head())
                         # 打印数据统计信息
            print("\n数据统计信息:")
            print(f"数据时间范围: {df['datetime'].min()} 至 {df['datetime'].max()}")
            print(f"收盘价范围: {df['close'].min():.2f} 至 {df['close'].max():.2f}")
            print(f"平均成交量: {df['volume'].mean():.0f}")
                         # 保存数据到CSV文件
            csv_filename = f"{contract}_5min_kline.csv"
            df.to_csv(csv_filename, index=False)
            print(f"\n数据已保存到 {csv_filename}")
                         return df
        else:
            print("数据加载超时")
            return pd.DataFrame()
                 except Exception as e:
        print(f"获取K线数据失败: {e}")
        import traceback
        traceback.print_exc()
        return pd.DataFrame()
    finally:
        # 关闭API
        try:
            api.close()
            print("\nAPI关闭成功！")
        except:
            pass
 def main():
    """
    主函数
    """
    # 获取5分钟K线数据
    df = get_5min_kline()
         if not df.empty:
        print("\n获取K线数据成功！")
    else:
        print("\n获取K线数据失败，请检查网络连接或合约代码是否正确。")
 if __name__ == "__main__":
    main()