In March, 2022, Shanghai was attacked by the covid-19 Omicron mutant strain. The government closed the city and imposed a "remain within doors" control on this metropolis. Under the lockdown, residents can only stay at home or their activities are limited to their residential areas, every resident must undergo frequent mandatory PCR testing; Schools, shopping malls, restaurants,subways and most hospital were closed. It is very difficult for residents to obtain medical treatment, non-staple food and medicines. At the early stage of the lockdown, some humanitarian disasters occurred.