Hello. Take airport bus to Wulinmen, 15RMB per person, 50-60 minutes. Then take a taxi to West Bus Station, 20-30RMB. Hangzhou West Bus Station has express bus to Tunxi, downtown Huangshan, about 2.5-3 hours. Change to another bus to the scenic area at Tunxi, about another one hour. There are also other buses which are not via the expressway, they will make several stops in Shexian county where you can get to Xidi and Hongcun, and they can run directly to Huangshan Scenic area, however, it will take more times. You can consider to take these kind of bus ont he way back and visit some other places by the way. Hope it helps.