Gahai is in Gaihai Country, Luqu Town, southern Gansu, near Langmu Temple. Ganhai Lake is a large freshwater lake in southern Gansu, sitting at the center of the pasture. The scenery is picturesque, as the mirror-like lake reflects the blue sky and white clouds on clear days. Gahai Lake is also a bird sanctuary in which black swans, egrets, wild geese and other water fowls live. There are various colorful wild flowers along the lake in July and August.