Take the cable car and hike the steps to the top.
You need rain below the mountain to have the sea of clouds. I wasn't sure if the heavy fog the day before would be gone by the early morning hours. Got lucky enough on this trip to see sunrise, sea of clouds and icy pines and majestic peaks.
Here's the perfect Huangshan golden sunrise over a sea of clouds which I had to hike up the day before through heavy fog and freezing rain. It was well worth it.