Best way to go from Guangzhou to Dongguang

I will be Arriving from Quito-Ecuador (South America) to GZ by air on April 6 2015; I need to travel on to Dongguang where PRINT CHINA 2015 Fair will be held (7-12April). I would like to know what is the best way to travel from GZ to Dongguang on that date (april 6 2015)