La Long Tso westland is a national nature reserve located in Pelyul county. It situated in the source of Za La river, which is the main tributary of Jinsha river. Its size is of nearly 3,000 hectares, and with altitude drop of 1,047 meters.

It is the first Wetland Nature Reserve of Kanze (Garze) Tibetan Prefecture, and also the largest one in Sichuan Province with the highest elevation, the biggest altitude drop, also known as habitat for the black neck crane and other Rare animals and plants.