If you take Guangzhou Metro Line 9 in Huadu, you can change to Line 3 in Gaozeng station, then take Line 3 to Jiahe Wanggang Station and change to Line 2. Please note that you should change to Line 2 in the direction of Guangzhou South Railway Station. Don&;t take the wrong direction. In this way, you can take Line 2 and get off directly at Guangzhou South Railway Station. If you are a tourist in Guangzhou, you are to come to Guangzhou next time. Have a nice trip!