SHANGHAI - Shanghai is working hard to overcome bottlenecks in logistics and help e-commerce platforms increase production and transport capacity amid strong COVID-19 flare-ups.

The megacity of 25 million people reported 3,590 confirmed locally transmitted COVID-19 cases and 19,923 local asymptomatic carriers on Friday, the municipal health commission said on Saturday.

"The epidemic rebound in Shanghai has caused severe pressure on online shopping, bearing in mind that many delivery persons are under closed-off management and some large warehouses have been temporarily closed," said Liu Min, deputy director of Shanghai Municipal Commission of Commerce, at a press conference on Saturday.

"Shanghai is going all out to restore transport capacity," Liu said. A total of 42 non-epidemic-hit warehouses of Shanghai's e-commerce platforms have resumed operations so far, with more than 18,000 delivery drivers completing about 1.8 million orders per day.