What is the best way to go from city center to Guangzhou airport?

There are many shuttle buses and express buses from the airport to the city center area, so you may choose one line to reach where you want to go in the city downtown area.
If you want to know the exact line, you may need to tell me which place do you want to go?
Generally speaking, the airport express line 1 can take you to reach the Civil Aviation Ticket Office near the railway station.