Alas, its biggest "core business" is in China, its largest market in terms of vehicle sales through its various joint ventures, and in China sales are in freefall at the moment, with many dealerships and manufacturing plants having closed due to the coronavirus and demand having collapsed. And this comes after GM's sales in China, as measured by the number of vehicles delivered to end users, plunged 23.4% over the past two years, from 4.0 million vehicles in 2017 to 3.1 million vehicles in 2019 (data from GM's 10-K SEC filings): And in the US, the second-biggest part of its "core business," sales have dropped 6.2%, from 3.08 million vehicles in 2015 to 2.89 million vehicles in 2019: And then, there is Europe and Russia, until 2008 GM's second largest market. After its bankruptcy filing in 2009, GM switched its focus to China to pursue its dreams, and its sales in Europe fizzled. In 2017, GM sold its German brand Opel and its UK brand Vauxhall and washed its hands off two decades of losses.