The HPV9 vaccine is suitable for the age range of 16-26 years old. It is very good to be injected before the patient has no sexual life, and if injected after having sexual life, it is recommended that the patient should first be tested for HPV virus before the injection, and if there is no infection, the injection is very good. If there is an infection, the patient can also be injected, but regular checkups are needed after the injection, because the vaccine itself can only prevent the occurrence of cervical cancer and cannot treat HPV infection that has already occurred. The nine-valent vaccine only contains the prevention of nine viruses, but not other HPV viruses. Therefore, if patients are not infected before the injection, it is recommended that they should have regular checkups after the injection, and the combined screening of HPV and TCT is not a problem, usually once every 3-5 years.