Cadillac still has a long way to go in China, but new models are helping sales grow quickly. Next up: The hot ATS sedan will soon arrive at China's Cadillac dealers. Photo: General Motors.

General Motors (GM 1.20%) has long been the market-share leader in China's booming auto market, but profits haven't been as big as you'd expect. The problem: About half of GM's China sales consist of Wulings, popular -- but cheap -- utility vans favored by tradesman. 

GM's CEO has a plan to change that, and that plan starts with Cadillac. Cadillac is a tiny player in China's super-profitable luxury-car marketplace, and it still has a long way to go. But as Fool contributor John Rosevear explains in this video, it's growing quickly -- and GM is putting a big effort behind its surging luxury brand.