There is an express train from Zhongshan to the provincial station. Take a ticket to 45 yuan, Guangdong Bus Station is very close to Guangzhou Railway Station. But it takes a long time, and there are dozens of kilometers of buses from Gaoping to Shi Qi. Eaton should be in Triangle Town, and you can go to the triangle intersection and wait for the "Fuyong" bus. At the triangle intersection, you can stop by raising your hand. It should be around 20 yuan to go to Guangzhou (you can ask your colleagues or the owners of those small shops at the triangle intersection, or you will have to wait there for a while, and there are several buses every day). There are different routes to Dongpu, Tianhe Bus Station and other places, and the destinations are all in Guangzhou. It doesn't matter which bus arrives first or which Fuyong you can take. If you have several options, you can take Dongpu bus first. There is BRT here. Take B2 line to get to Guangzhou Railway Station faster, or take Metro Line 5 directly to Guangzhou Railway Station (BRT is 2 yuan, subway should be 4-5 yuan).
Remember, the road is on your tongue. People in Guangzhou are very enthusiastic and have a good attitude. Ask more questions if you don't know the way. Shopkeepers or newsstand owners are better choices. It would be better if I met Lei Fenggang. They are specialized volunteers and will be familiar with them.