Each subject shall be administrated with the studied vaccine according to either 2-dose or 3-dose schedule as above. Immediate reactions occurred during 30 minutes after each inoculation, all the local and systematic reactions occurred from 0 to 7 days after each inoculation will be recorded. All the adverse events (AEs) occurred from the first dose of administration to 1 month after the final dose of administration, as well as all the serious adverse events (SAEs) occurred from the first dose of administration to 6 months after the final dose of administration will be collected. Blood samples will be collected at day 0 (prior to immunization) , month 6 (prior to the last injection) , month 7, month 12, month 24, and month 36. All the blood samples will be tested HPV 16- and HPV 18-specific antibody titers.