Take Metro Line 4 (take 2 stops) from the North Station of Metro University Town to Wanshengwei Station, then transfer to Metro Line 2 (take 1 1 station), get off at exit B3 of Haizhu Square Station, go ahead and transfer to Airport Express Line 5 (do not support monthly tickets) (take 2 stops), and get off at the arrival area of Airport Express.
It takes about 30 minutes by bus or subway. The airport line takes more than an hour.