From HK to GuangZhou - Train is highly recommended by trex101
From HK to Guangzhou, its HIGHLY recommended that you take an express train from Kowloon Hung Hom train station to GZ. The coaches from the HK airport direct to GZ might seem convenient but it takes way too long!! HKD250 per pax.My experience 2.20PM coach from HK airport to GZ, we reached GZ at 8.40pm in the evening and no toilet stops in between!
Express train from Guangzhou Dong Zhan (GZ east train station) to HK HungHom station. 1hr 30mins. Express train cost RMB 253 (premium class)
Coach is not worth it at all! And for those wondering, you need to carry all your luggage across the immigration check point if taking coach. Not for the train riders tho'.