[1/3] A cutout depicting Chinese President Xi Jinping is on display outside a gift shop in Moscow, Russia May 3, 2023. REUTERS/Evgenia Novozhenina Summary China's post-COVID diplomatic blitz sending mixed messages Security concern, US rivalry seen impeding outreach China has "progressively closed up" - analyst Foreign firms wary of "emboldened" Chinese security BEIJING/HONG KONG, May 8 (Reuters) - China's increasing focus on its own security and intensifying rivalry with the United States threatens to turn its re-engagement with the world after years of COVID curbs into a new era of isolation from the West, analysts say. Since casting off pandemic...