Are there frequent buses to the foot of the danxia mountain also from shaoguan east railway station?

Yes, after getting out of the railway station, walk across the road to find the buses to Renhua. Get on it and get off at the mountain scenic area. You can ask the driver to remind you of the srop-off site. It takes 50-60min and costs CNY16 per person. Alternatively, you can directly transfer to the train for Danxiashan. After arriving, walk around half an hour to the mountain while seeing the nice scenery.