Nio this week opened a showroom in Amsterdam in the Netherlands, while Xpeng last week launched its G9 and G6 sports utility vehicles in France. Xpeng also had a car on display at the VivaTech conference in Paris, while BYD likewise showed off one of its vehicles.PARIS — Chinese electric carmakers are pushing ahead with expansion into Europe, even as politicians raise the possibility of high tariffs on vehicles from the world's second largest economy.The public marketing efforts come amid an ongoing investi ...