https://www.reuters.com/article/us-usa-trade-china/huawei-ban-clouds-u-s-china-trade-talks-tech-sector-idUSKCN1SM23A >A U.S. bid to block China's Huawei Technologies from buying vital American technology threw into question sales from some of the largest tech companies and drew a sharp rebuke on Thursday from Beijing, which warned it could hurt trade talks.