Tesla Q3's income in China has soared by nearly 80%. The low-cost factory in Shanghai promotes the company's gross profit margin.

According to documents submitted by Tesla to SEC on Monday (25th US Eastern time), Tesla’s revenue in the Chinese market reached 3.113 billion US dollars in the third quarter of this year, up 78.5 percent from the same period last year. Tesla’s gross profit margin rose sharply in the third quarter, mainly due to lower production costs at the Shanghai factory, according to the document. According to the documents, Tesla earned US $9.015 billion in revenue in China in the first three quarters of this year, accounting for about 25% of Tesla’s global income, making it Tesla’s second largest market…