Hi,I will be in Huangshan for two days and then I need to go to Hangzhou, it´s possible go by bus?

Yes, you can take the direct coach to back to Hangzhou from Tangkou Bus Station (the transport transfer hub at the foot of the mountain). As I know, the bus schedules are 06:30, 06:50, 07:40, 14:15, 15:30, 16:30 and 17:00. The ticket fare is CNY 100 per person. Generally speaking, it takes 3.5 to 4 hours on the way.