On a stage reserved for the biggest players in the global telecoms industry, three Chinese firms took their place alongside three Western companies -- and pushed the message that they wanted to "work together". But the state-owned companies -- China Mobile, China Telecom and China Unicom -- have been barred from doing business in the United States, severely hampering their global ambitions. The U.S. authorities cited security and risks of meddling by the Chinese state -- similar reasons lay behind Huawei's exclusion from the U.S. market in 2020. With a relatively small international footprint, all three firms used their presentations...