*ST海华:青海华鼎股票交易异常波动暨风险提示的公告公告日期:2026/04/27 · 栏目:股票交易异常波动公告链接:http://static.sse.com.cn/disclosure/listedinfo/announcement/c/new/2026-04-27/600243_20260427_GPZQ.pdf