https://www.reuters.com/article/us-usa-huawei-tech-commerce/chinas-huawei-restricted-from-using-u-s-suppliers-idUSKCN1SM2MG >The Trump administration on Thursday officially added China's Huawei Technologies Co Ltd to a trade blacklist, immediately enacting restrictions that will make it extremely difficult for the telecom giant to do business with U.S. companies.