Chinese state-owned companies have been barred from doing business in the United States, severely hampering their global ambitions - Copyright AFP Indranil MUKHERJEE Joseph BOYLE 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 US authorities cited security and risks of meddling by the Chinese state...