Below the terrace, the yellow glazed roofs of the Hall of Dispelling Clouds and its courtyards lead the eye to the vast grey expanse of Kunming Lake, dotted with boats, with South Lake Island and the Seventeen-Arch Bridge in the distance. Qianlong had the lake dug out in 1750 on the model of the West Lake of Hangzhou, and named it after a lake where Emperor Wu of Han trained his navy.