guangzhou airport to Guangzhou South railway station

i think the best way is to take subway. take line 3 (north branch) from the airport to Jia He Wang Gang, and then change to line 2 and get off at Guangzhou South Railway station and leave the station from Exit H. It takes about 1 hour and cots CNY 9 per person.
If by taxi, it takes about 1 hour if there is traffic jam, and costs almost CNY 200.

Thank you Kelly....Do I need to buy the express china train tickets now? If so, where I can purchase the express ticket advance?

thanks,
Bettie

The ticket is not difficult to get and you can buy it at the Guangzhou South Railway Station before departure, then you need to arrive at the station about 2 hours before your scheduled departure time.
If you travel in peak time, like the Golden Week (October 1 - 7), then i suggest that you book at least a few days in advance. Chinese railway tickets are put on sale 20 days in advance, and you can book with an online agency.