Serxu (sershul) District is situated at the northernmost tip of Sichuan province. It is above 25,000 km² et and mainly covered by graslands. Average level above sea is 4200 m.
It has an area of over 25’000 square kilometres and is predominantly nomadic grassland. The population is around 68’000, 96% of whom are ethnic Tibetan.
By the end of 1997, there was an estimated livestock population of 581’470, mainly yaks, sheep, goats, horses, and a small number of pigs. The human population of Shiqu County was approximately 63’400 and 96.8% were ethnic Tibetans; there were 49’100 herdsmen, representing 77.6% of the population. (wiki)