Auto parts industry prospects? What expertise do need to learn?

This there is no doubt that Chinese are more and more cars, accessories and classified as service industries, not ended. And broad money scene.
Expertise to master, the more professional the better you will make money, proportional.
Also specific to cars, Mercedes Benz, BMW, BMW, BYD BYD, if you in addition to Guangzhou and other cities in addition to Beijing, preferably not more than 4 model species, because less is more refined.