Question: 长江电力最近一个交易日的开盘价是多少？
Answer: 必答点：长江电力最新交易日的开盘价
精度要求：仅允许四舍五入误差
Time: 2025/8/14
Real-time data: {"600900___SH":{"RT_TIME":"150001","RT_OPEN":"27.62","RT_DATE":"20250814"}}