Herdsmen are milking the sheep in Deru Village, Rishong Town, Ritu County, Ngari Prefecture. Photo/Chen Hehua, He Huizhong

Animal husbandry has always been the advantageous industry in Ngari Prefecture, southwest China's Xizang Autonomous Region. Its butter, yogurt, beef, mutton and other products are sold all over the country, which are the major income source of local herdsmen.