where is the exact location at the Kunming airport to take bus to the stone forest?

You can take the bus at the Ground Transportation Center. Upon landing, you can find the boarding site easily based on the English signs at the airport. Or you can ask help for the airport staff. As I know, the bus schedules are 09:30, 10:30, 11:30, 12:30, 14:00, 15:30, 17:00 and 18:00. It costs CNY45/person.

Thank you so much Claire