There are daily flights from & to Shanghai, Beijing and Guangzhou usually in the evening. If you are on a business trip to Shanghai or Beijing, you can take the advantage of a weekend flight or a night train and you can fly here on Friday evening and back to Shanghai on Sunday evening. By the way, there is an express way to Hangzhou from Huangshan City, 210 kms. 3 hours to West Lake. You can leave here at 8, have lunch by the West Lake and back to your Shanghai hotel within 2 hours.

Please consult http://www.shanghai-huangshan.net for detailed info.