Using a sampling survey method, the Urban Investigation Team conducted a four-month (June October) house-to-house survey in 1995 of 45 families with the 10th Group under the Lhugu Neighborhood Committee in Lhasa. This activity received the help and support of related departments, such as the Lhasa Municipal Committee of the Communist Party of China (CPC), the CPC Chengguan District Committee, Barkor Street Subdistrict Office and Lhugu Neighborhood Committee.