In the Haixi section (海西, pp. 376-425) of the official 1990 Qinghai census report (青海省第四次人口普查手工汇总资料), this area is listed as a 'district' (区), but according to the Baidu.com entry on Delingha (http://baike.baidu.com/view/205827.htm), this area is a 'neighborhood' (街道).