Thank you Mr. Kevin & Ms. IVYSKY for all the help which is very useful to me. There is still one thing which still puzzle me.

The subway line 3 is supposedly end in Baiyun Airport, but why it is indicated as Airport (S) in the subway map? But according to the direction, it is supposed to be North of Guangzhou city. Or is there another airport beside this on for international flight? I do not wish to take the wrong subway.

Thank you again.