As early as June 30 this year, a consumer complained about Sanlu milk powder to the "Message Query" section of the Food Production Supervision Department of General Administration of Quality Supervision, Inspection and Quarantine. The query number was [20080630-1622-25262]. According to the informer, five infants contracted kidney stones at Hunan Children Hospital and these sick infants had been eating Sanlu milk powder for a long time. The complainant also said anxiously in the message board: "Please find out whether there is problem with the milk powder as soon as possible to avoid more infants contracting this disease".