Police in protective gear watch an ambulance pass at the entrance to a tunnel leading to the Pudong New Area across the Huangpu River in Shanghai on Tuesday. The city reported 4,502 local cases on Thursday. Photo: IC Photo

A disease control worker sprays disinfectant Thursday at the Bund in the Puxi area, situated on the west of Huangpu River. Photo: VCG

The Yu Garden walking street market, a popular attraction in Puxi, appears empty Monday under Shanghai’s strict movement restrictions. Photo: VCG

Volunteers and medical workers gather at a test point to prepare for a new round of mass testing in Puxi on Friday. Photo: VCG

A medical worker conducts a nucleic acid test on a resident Friday in Puxi. Photo: VCG

Locals buy food at a market in Shanghai on Friday. Photo: IC Photo

Disease control workers at work Wednesday on a street in Puxi, where stores are closed due to a lockdown. Photo: VCG

Police in protective gear manage traffic on a road in Puxi on Friday. Photo: VCG

Roads appear empty in Puxi on Friday following restrictions imposed there Photo: VCG

Puxi has sealed off bus lines, taxis and ferry services for a lockdown from Friday to April 5. Photo: IC Photo

The Shanghai New International Expo Centre in Pudong New Area has been converted into a makeshift hospital to treat mild Covid-19 cases and asymptomatic carriers. Photo: VCG

The makeshift hospital is Shanghai’s largest Covid-19 isolation site, covering 300,000 square meters, and containing more than 15,000 beds. Photo: VCG

Workers build the hospital on Wednesday. Shanghai has turned two exhibition halls into quarantine sites following a spike in cases. Photo: VCG