If you have a type rating in a jet that is not available in China ( for example, B747-200, or CRJ-900 ), you need to purchase your own B747-400 type before starting class. Otherwise the company types you, and X amount is deducted from your check every month and then at the end of 3 years you get it back. For commuting you can do what is called a 20X. Basically have 10 days off in a row BUT you have to use your vacation to get that block. Keep in mind, things change almost daily but I believe that is the deal for now.