They're doing well enough with their regular network:
22,300 buses @ $22/minute = $12.9 million revenue per month
But just a relatively tiny number of airport buses is bringing in ~25% of that already:
436 buses @ $341/minute = $3.4 million revenue per month
Amazing potential here, the above does not even include the new 5th airport. They got a 5 year contract on the new Hunan contract, I wonder what kind of contracts they have for the other 4.