Read more: Tesla Looking to Boost Shanghai Car Production With Second Shift

Prior to the pandemic-induced halt on March 28, Tesla workers in Shanghai were working three shifts covering 24 hours, seven days a week. The workers in the current closed-loop system have been doing 12-hour shifts, six days a week.

One of the problems stems from a shortage of wire harnesses from Aptiv Plc, which had to stop shipping supplies from a plant that supplies Tesla and General Motors Co after infections were found among its employees, Reuters said.

Tesla’s Shanghai factory, which in regular times pumps out around 2,100 cars a day, remains challenged by component shortages, other people familiar said last month. The US carmaker only has inventory for just over two weeks based on its current closed-loop schedule and logistics are a major problem for many other parts. BM