More Tellhow Sci-tech Co., Ltd. Class A news Tellhow Sci-tech Co., Ltd. Class ASSE: 600590 关于为控股子公司提供担保的公告 Nov 19, 2025 · Issued by Tellhow Sci-tech Co., Ltd. Class A via Shanghai Stock Exchange As issuedPlain English 关于为控股子公司提供担保的公告仅供参考,请查阅当日公告全文。公告全文参考链接: View Attachment