A staff member explains the China-made Tesla Model 3 vehicle at the Shanghai Gigafactory of the U.S. electric car maker in Shanghai, China December 30, 2019. Less than a year after construction started, Tesla's first Chinese factory is about to start delivering cars. Construction only started in January, but Tesla says it will deliver the first cars from its inaugural Chinese factory on Monday (December 30). REUTERS/Yilei Sun

A China-made Tesla Model 3 vehicle is seen at a delivery ceremony in the Shanghai Gigafactory of the U.S. electric car maker in Shanghai, China December 30, 2019. That will be just 357 days after it started work on the new plant, a record turnaround for major automakers in China. REUTERS/Yilei Sun

A China-made Tesla Model 3 vehicle is seen at a delivery ceremony in the Shanghai Gigafactory of the U.S. electric car maker in Shanghai, China December 30, 2019. The Shanghai facility is part of Tesla's plans to grow in the world's largest car market. REUTERS/Yilei Sun

Tesla's China chief Zhu Xiaotong and staff members attend at a delivery ceremony for China-made Tesla Model 3 vehicles in the Shanghai Gigafactory of the U.S. electric car maker in Shanghai, China December 30, 2019. Now the company aims to produce 250,000 vehicles a year at what is the first wholly foreign-owned car plant in China. REUTERS/Yilei Sun

Employees clean a China-made Tesla Model 3 vehicle at the Shanghai Gigafactory of the U.S. electric car maker in Shanghai, China December 30, 2019. REUTERS/Yilei Sun

China-made Tesla Model 3 vehicles are seen at the Shanghai Gigafactory of the U.S. electric car maker in Shanghai, China December 30, 2019. REUTERS/Yilei Sun