Question: 通富微电的最近一个交易日开盘价是多少？
Answer: 必答点：通富微电最新交易日的开盘价
精度要求：仅允许四舍五入误差
Date: 2025/8/14
Reference data: {"002156___SZ":{"RT_TIME":"150000","RT_OPEN":"28.94","RT_DATE":"20250814"}}