碧兴物联:董事会秘书工作细则公告日期:2026/08/05 · 栏目:议事规则/实施细则 · 代码:688671公告链接:http://static.sse.com.cn/disclosure/listedinfo/announcement/c/new/2026-08-05/688671_20260805_V1B4.pdf