China is one of Tesla's ( TSLA ) - Get Tesla Inc. Report most important markets. Elon Musk's group has built a gigantic factory there -- called Giga Shanghai -- which serves the country and Asia. And it will serve Europe until the company opens its production site in Berlin-Brandenburg, Germany. China, the world's largest automotive market, is key to Tesla's goal of producing and selling several million vehicles a year. The gigafactory in Shanghai has become the epicenter of production of the Model 3 and Model Y, respectively the Austin company's entry-level sedan and midsize SUV. Tesla aims to...