I intend to go to Guongzhou from Shenzhen by Express Air Con Train. How long will it takes to reach Goungzhou.? How much is the train fare? Which train station should I go from Shenzhen?How many train services going to Guongzhou from shenzhen per day and vice versa ? If I have to return to shenzhen on the same day, what time should I go to catch the last train service? Your guidance and advise would be great appreciated. Thanks