Question: 长江电力的最新交易日的最低价
Answer: 必答点：长江电力最新交易日的最低价
精度要求：仅允许四舍五入误差
Date: 2025/8/14
Reference data: {"600900___SH":{"RT_TIME":"150001","RT_DATE":"20250814","RT_LOW":"27.6"}}