What is the best way to get to Huang Shan from Hong Kong in May, and please recommend a good airline.

You may fly from Hongkong to Shanghai first and then fly to Huangshan from Shanghai. Alternatively, you can also take bus or train to Guangzhou, from where you may go to Huangshan by air. As for the airlines, the big airline companies, such as China Southern Airlines, Air China, Eastern Airlines are recommended.