How can I book a ticket for airport shuttle from Chenggong to Kunming Changshui Airport(KMG)?

As I know, you cannot book the shuttle bus tickets in advance. You need to purchase the fare when you arriving at the bus station. However, there is only one schedule at 07:50 from Howard Johnson Tropical Hotel in the New Area of Chenggong. You are suggested to arrive there as early as possible. :)