take metro from airoprt to xiaobei road

hi , i will be at guangzhou airport for 7:30 hours as transit so i would like to see the city so the question is can i go to xiaobei road and back on time and how long it takes ? how much ? because i will arrive at 11:00 am and leave at 7:50 and please i want to know the direction to take metro with detailes . . thank you vrey much :)