Subway transportation from Guangzhou baiyun ariport to beijing perdestrian street

From baiyun airport going to beijing pedestrian street in GZ by subway.which is more convinient ,more faster more cheaper among this 2 options of riding a sub way from Airport south station to beijing lu station?first option .AIrport south station line3to jiahewanggang station transfer to line 2 going to haizhustation and transfer to line 6 to beijing lu station to reach the distination. Second option, Airport south station line 3 going to yantang station transfer to line 6 going to beijing lu station to reach the distination.