Hong Kong International Airport to Guangzhou Domestic Airport

Hi,

My flight arrival time at Hong Kong international Airport is 9:40 am. I will need to rush to baiyun airport to take a flight at 6:00 pm for which I will need to reach GZ Airport at lease 1 hour ahead of the departure time.
Can you please let me know is there any direct bus service from Hong Kong International Airport to GZ Airport and how much is the fare and what is the travelling time.

Let me know the bus schedule timing.

If, there are no direct bus, then kindly let me know the alternate way to reach GZ from Hong Kong international Airport.

Thank you