Hi, is there a direct bus from the airport to hong kong? If so, where could I find it? Many thanks!

There are two ways from CAN to HK:
You can take the subway line 3 to reach local East Railway Station. There you can take the direct train from the city to Hung Hom, Hong Kong.
Or you can take the shuttle bus line 5 to Haizhu Plaza. Getting out of the station from Exit A, you will find the Landmark Hotel, where you can take the cross-border coach to HK.