The Wall Street Journal recently quoted informed sources as saying that AT & T had abandoned its cooperation with Huawei, and this has been confirmed by Huawei; the specific reasons for the cancellation of cooperation is currently unknown. In fact, the United States has blocked Huawei's products and services, as well as its investment and mergers and acquisitions of American companies for a variety of reasons. The most powerful country in the world preventing a Chinese technology company from entering the market has created the biggest possible market access discrimination against a single firm in the history of the United States.