Which station in Guangzhou has buses to Guiping City, Guangxi? What are the prices and availability?

There is only one bus from Tianhe Passenger Terminal back to Guiping in the morning. It seems to leave at 8:30 in the morning and arrive at 4:30 in the afternoon. There is also a bus from Guangzhou Huadu back to Guiping, one in the morning and one in the evening. There are the most cars at Jiaokou, and all cars returning to Guiping will pass through Jiaokou. If there are not many passengers on the car, they will continue to wait at Jiaokou until the passengers are full before driving. There is a express bar at the Provincial Station during the day to go back to Guigang and pass by Guiping Station to let you off. The price is about thirty or forty yuan more than the sleeper car, but the time is about the same. The normal return ticket is between 60 and 80 yuan, except during holidays. This is the price of buying a ticket on the train. It is more expensive if you buy a ticket at the station.