https://www.reuters.com/article/us-usa-china-huawei-tech/by-spying-on-huawei-u-s-found-evidence-against-the-chinese-firm-idUSKCN1RG29T >U.S. authorities gathered information about Huawei Technologies Co Ltd through secret surveillance that they plan to use in a case accusing the Chinese telecom equipment maker of sanctions-busting and bank fraud, prosecutors said on Thursday.