According to people familiar with the matter, due to the lack of key chips, Tesla, Inc.A production line at the Shanghai factory suspended some production last month for about four days.

The people familiar with the matter spoke on condition of anonymity because the details were kept secret. One of the people familiar with the situation said that the shortage is mainly for the chips needed for the electronic control unit (ECU), a small device that controls one or more electronic systems in the car, a problem that has mainly led to delays in the production of Tesla, Inc. 's Model Y model. At present, production has returned to normal, according to people familiar with the matter.

In July, Tesla, Inc. shipped about 33000 electric vehicles in China's domestic and overseas markets. The company had previously suspended some production at its US car assembly plant for about two weeks in February as a backlog of goods at the port and a snowstorm affected ground transportation.