Introduction to the Sea of Clouds: The clouds and fog in Ludong Mountain are a wonder in the world. It is said that there are fogs 365 days a year, at least more than 200 days. Whenever the thick fog rises, thousands of peaks and ravines are soaked in clouds and mist, many valleys and rivers are distributed radially, and many strange peaks and ridges are stacked on top of each other, forming a sea of clouds and fairy mountains.