At dusk in the early summer, we can feel evening breeze in the Yanqi Lake. Walking along the lake, everyone feels agrreable. Facing the north, there is the Great Wall; facing the south, there is the vast North China Plain--it is a beautiful water park. The lake is wide, and the water is clear. We travel by boat across the thousand-meter lake surface, or cut waves, and experience the enjoyment of striking with the wind and waves, the natural beauty of lakes and mountains, and the feeling of going back to the nature.