I plan to travel to Huangshan Mountain on New Year's Day. I can't book a room for three days. Can I go directly? Will there be no room to live at the top of the mountain?

If you can't book a room online, you can ask the travel agency. They have different channels. If there is no room in the travel agency, it is basically full. It is not recommended to go directly, especially to the top of the mountain. If you are lucky, you may have a room (but the price will be high) or you may not have a room. That would be even worse (especially in winter)!