Shuttle bus/locker at kunming

Hello, I'm Siti from Malaysia :)

I want to take the shuttle bus from Kunming Railway station to Kunming airport around 8/9PM:
1 - Is the transportation still available around this hour? What is the operation time for transportations at Kunming airport/railway station?
2 - What is the number/line of the bus that I need to board to get to Kunming airport?
3 - What is the price per person to board the shuttle bus?
4 - Is there a locker at Kunming railway station? as i want to sightseeing at Kunming and left my luggage for a while.

Thank you in advance!