This is a natural lake with an area of 466,620 hectares on Weining Mountain, two thousand meters above sea level, in the north west of Guizhou. The lake has a reputation for its beautiful scenery. If you climb to the top of Viewing the Sea Tower (Guanhailou) by the lakeside before dawn, you will be treated to a view of a fine sunrise, with its reflection in the lake. The scene is particularly pretty in spring when peaches, plums, apricots, and wildflowers are in bloom. The sight of hundreds of fishing boats sailing on the lake provides a charming prelude to spring.

A sanatorium has been built on Yangguan Island in the lake.