A slowdown in China’s electric vehicle (EV) sales has revived murmurs of another blow to Tesla (TSLA). While September saw the company’s EV sales grow 15.5% year-over-year, the growth rate slowed down to just 7.3% in October. In fact, overall car sales in China declined by 0.8% year-over-year, compared to a 6.6% increase in October. So, is this a cause for worry for the world’s largest automaker? Not really, simply because Tesla's sales in China have been weak for a while now. Tesla's sales saw a year-ove ...