Shenzhen Airport Shuttle Bus

Please advise:-
1. Airasia flight will reach which terminal?
2. What is the bus line to and fro Shenzhen airport to Luohu area?
3. Which terminal to go for the shuttle bus from airport to luohu area?
4. How much is the bus fare per pax?
5. How long is the bus trip to luohu area and have to wait for how long for each bus?
6. Which stop to wait for the shuttle bus from luohu area to Shenzhen airport?
7. Where to buy the shuttle bus ticket at airport?