How much does it cos from Guangzhou to Hong Kong and GZ to Shenzhen?

From GZ East Railway Station, there are several trains to reach HK and the ticket fare is around 190HK$. For detail timetable, it is suggested to check on the Train Section on this website.
From GZ to SZ, the bullet trains from GZ East Railway Station costs about 79.5RMB for the second class seat and 99.5RMB for the first class seat. The bullet trains from GZ South Railway Station costs about 74.5RMB for the second class seat and 99.5RMB for the first class seat. The train schedule is also suggested to check on your own.