Introduction to Shuanglong Lake White Swan Viewing Area: Every year from winter to early spring of the following year, when the wind is cold and the snow is falling, thousands of white swans fly from distant Siberia to Sanmenxia to live and overwinter. This place is vast and clear. , the rippling blue lake surface has become the largest gathering and viewing place of white swans on the Yellow River. They are here leisurely and contented, soaring in the sky, patrolling the river, or floating on the water, in various poses, forming a picture of the unity of nature and man, and the ethereal nature of all things.