The factory makes the electric Model 3 sedans and Model Y sport-utility vehicles for domestic and international markets, including Germany and Japan.

Around 240,000 vehicles were shipped from the factory in the first eight months, including many for export, according to data from the China Passenger Car Association. Tesla has not announced details on the factory's production.

The sources requested anonymity, as they were not allowed to speak to media. Tesla did not immediately respond to a request for comment.

In August, an official in the area where Tesla's factory is located said it is expected to product 450,000 vehicles this year, including 66,100 for export.

Tesla is hiring managers for legal and external relations teams in China as it faces public scrutiny in the country over data security and customer service complaints.

(Reporting by Yilei Sun and Brenda Goh; Editing by Dan Grebler and William Mallard)