https://www.reuters.com/article/us-huawei-usa-charm/in-u-s-charm-offensive-chinas-huawei-launches-ad-to-combat-dark-image-idUSKCN1QH2V5 >Huawei Technologies ran a full page ad in major U.S. newspapers on Thursday urging readers not to believe "everything you hear," about the Chinese tech firm, as it defends itself against government accusations its equipment can be used to spy.