There is no train schedule between Nanjing South to Anhui (Huangshan).

Yes, no train leaves from the local South Station and trains between the two cities are available in the local main railway station. If it is ok with you, you can take it instead and it takes 6-8h.

To Huangshan City, there are three buses at local Xiaohongshan Bus Station, leaving at 07:30, 15:00 and 19:00. The fare is CNY115 – 117. To the Mountain Scenic Area, you are suggested to take a direct bus at the South Bus Station. Two buses are available at 07:00 and 11:50.