Xpeng sells a limited-edition version of its P7 sedan with scissor doors. Xpeng Three electric-car startups have risen to the top of the pack in China. Nio, Xpeng, and Li Auto are all challenging Tesla in what's becoming its most crucial market. Here's a quick guide to the companies and the high-tech models they sell. Nio The Nio lineup. Nio Shanghai-based Nio was founded in 2014 by William Li, a billionaire entrepreneur who got rich selling services to the auto industry. Nio currently sells three models and has a fourth on the way for early 2022. It's delivered some 140,000...