China warned of an urgent and bleak situation after recording dozens of new infections with the Corona virus, despite the comprehensive closure measures that have been going on for weeks, due to the outbreak of the worst wave of the epidemic in a number of cities, especially in the capital, Beijing and Shanghai.

Shanghai authorities erected green metal fences to restrict the movement of residents in the streets, at a time when doubts were raised about the efficacy of vaccines made in China, since Beijing did not import any vaccines manufactured abroad.