Since 2020, large factories in China, such as Foxconn’s in Zhengzhou, have responded to outbreaks in nearby areas by establishing the closed circuit, which isolates workers for long periods of time at the facilities to avoid contagion from abroad and maintain productionwhich has sometimes caused protests due to poor sanitary conditions or the lack of food.
China remains clinging to zero covid policywhich consists of the isolation of all those infected and their close contacts, strict border controls, restrictions on mobility and massive PCR test campaigns wherever a case is detected.