Originally Posted by
travelinmanS
You can buy your return ticket in HK no problem. From what I hear from my colleagues in Guangzhou, the trains are empty as no mainlanders are visiting HK now. Should have no issue getting tickets day of travel.
Things are generally very different at Canton Fair time. Trains tend to be much more crowded. Even under the current circumstances I would think waiting for the day of travel is a risky thing to do. Maybe you get tickets, but maybe not on the train you want.