So... communism, huh?
There are quite a few countries in the world, usually those with a truly absurd imbalance between rich and poor, where it is the norm for the very rich to send their children to be educated overseas. Since communism is pretty much dead in all but name in China, the country now has quite a lot of these kids in the US, exported here for education. And in LA, they seem to have formed a sort of subculture of extreme wealth and flashy cars.
Since communism is not dead in name, having children so blatantly flaunting their wealth would be unseemly for most of these kids' parents, so this is a rare glimpse into their world.