by Beiyi Seow © Agence France-Presse BEIJING, China (AFP) — Shanghai’s grinding coronavirus lockdown is slowly clogging China’s supply chains, as delays hit the world’s busiest container port where staff are tangled in a morass of Covid controls. Beijing has refused to tack away from its strict zero-Covid strategy that has protected its public health system through the pandemic but at a mounting economic cost. China’s financial hub Shanghai — home to multinational firms […]