Transport back to Huangshan City

Hi, I am travelling to the Yellow Mountain in the beginning of June. I already know how that I can get a bus from downtown area to the Yellow Mountain, but I was wondering when and how often these busses go back from the Yellow Mountain to the city? As my train back to Shanghai leaves at 2 p.m. I was wondering whether I will be able to return to the city on a Sunday morning. Can you help me?

Thank you!!!
Katy