自2008年10月1日起，凡办理各类外国人签证申请和各项居留许可业务（包括申请延期与变更），均需携带有效境外人员临时住宿登记单原件并提交复印件一份（住宿登记单右上角须有统一编号，编号由英文字母和数字组成）。
From the 1 Oct.2008 on,any applicant either for visa or residence permit (including for extension and alteration) should hold a valid and original Registration Form of Temporary Residence,and submit a copy of it.(The registration form must bear a serial number which composed of English letters and numbers at the top right corner)
（来自公安部网站）
