Can I get a train from hkia to Guangzhou After 8pm ?

There is no train that operates between HKIA and Guangzhou. You need to take the train from HK Hung Hom Railway Station. But you cannot catch the last schedule on 20:01. In order for your convenience, you are suggested to take the direct coach from HKIA to Guangzhou. The bus schedules will until 22:45. It costs 220 HKD to 250 HKD per person. The duration is around 3.5 hours.