At nine o'clock. According to the notice of Xuzhou Fengxian Medical Insurance Fund Management Center, the business hours are from 9: 00 a.m. to 6: 00 p.m., and there is no rest on Saturday and Sunday, so Xuzhou Fengxian Medical Insurance Fund goes to work at 9: 00. Fengxian Medical Insurance Fund Management Center is located in Xuzhou City, Jiangsu Province. Its purpose and business scope are "to provide medical insurance services for employees of insured units within its jurisdiction, publicize and consult medical insurance policies, collect and manage medical insurance benefits, and supervise and assess designated medical institutions and retail pharmacies".