You can take a bus from China Normal University to Guangzhou in about four hours, and then take the subway from China Normal University to the railway station for one hour. Pay attention to safety, six hours in advance.

If you don't have a car, you can take a bus at the window of the world.

There should be a direct bus to the railway station. Look for it. There should be one at school.

A taxi is ok, maybe it's more expensive. It is safer for several classmates to take a taxi together.