We are staying in Hang Zhou for 3-4 days, can we go visit Huang Shan for a day? And how?

Yes, you can. But you are advised to spend two days to enjoy the beautiful mountain. You may take a long-distance bus to the scenic area from West Bus Station for CNY 96 or 110. The bus departs at 8:00, 9:50, 10:50, 12:40, 14:10, 15:10, and 17:45. The duration is about 3 hours.

Lewis,thank you for the information. Kit