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Bama Yao Autonomous County,whose residents have a reputation for longevity,is located in the northwest of Guangxi Zhuang Autonomous Region under the administration of Hechi City.Covering an area of 1,971 sq m,the county is high in the northeast and low in the southwest,surrounded by stretches of mountains and hills,and has relatively little arable land.It has a heterogeneous population of 270,000in which 12 ethnic groups are represented,among them Yao,Zhuang,and Han.According to the fourth demographic census,there were 1,958 seniors aged between80 and 99,and 69 over the age of 100.The oldest one is 135 years old.The ratio of centenarians there is 30.8 per 100,000,ranking the fi rst in the world.
Bama Yao Autonomous County, whose residents have a reputation for longevity, is located in the northwest of Guangxi Zhuang Autonomous Region under the administration of Hechi City. Overpass an area of 1,971 sq m, the county is high in the northeast and low in the southwest , surrounded by stretches of mountains and hills, and has relatively little arable land. It has a heterogeneous population of 270,000 in which 12 ethnic groups are represented, among them Yao, Zhuang, and Han .According to the fourth demographic census, there were 1,958 seniors aged between80 and 99, and 69 over the age of 100.The oldest one is 135 years old.The ratio of centenarians there is 30.8 per 100,000, ranking the fi rst in the world.