FREMONT, CA—According to Bloomberg, Tesla Inc. is sending engineers and production staff from its recently upgraded Shanghai factory to its plant in Fremont, California, to boost production at the US facility.

The Elon Musk-led carmaker will dispatch staff -- in particular automation and control engineers -- to assist efforts to increase output in Fremont, where Tesla produces the Model S, X, 3 and Y vehicles, the people said, asking not to be identified because the information is private. About 200 people will head to California on assignments that will last at least three months. A representative for Tesla in China declined to comment.

Tesla delivered a record 83,135 cars in China in September after increasing the capacity of its Shanghai factory. The upgrade of the company’s first plant outside of the US, which entailed machinery maintenance and improvements overseen by automation and control engineers, took about five weeks. Bloomberg News has reported that this helped double the factory’s annual capacity to around 1 million vehicles.

Fremont can produce about 650,000 cars a year. The uptick in production has contributed to shortening wait times for a Tesla in China to one to four weeks, from a peak of as long as 22 weeks earlier this year, according to the automaker’s website. Last week, the company cut prices across its lineup to attract buyers in the face of tougher competition from local manufacturers, including BYD Co., which is also expanding globally.

By comparison, customers ordering a Model Y sport utility vehicle in the US may have to wait until as long as April 2023 for delivery, Tesla’s website shows. In its third-quarter deliveries report, the company has increasingly had trouble transporting vehicles from its factories to customers.

Tesla delivered 343,830 cars worldwide last quarter and is expected to come up just shy of its target for 50% growth this year, a rate its forecast will be its average over several years. The company opened new factories in Germany in March and Texas a month later.