At present, there are three kinds of HPV vaccines in Hong Kong, namely bivalent Huiyankang, tetravalent plus vaccine and nonavalent plus vaccine. Among them, bivalence is limited to female vaccination, which can prevent HPV 16. 18 subtype; Tetravalent male and female can be inoculated, which can prevent human papillomavirus 6.11.16.18; Nine-valent can be inoculated to both men and women, which can prevent nine subtypes of human papillomavirus 6.116.18.31.33.45.52.58. I asked Hong Kong Qijian before that it is more appropriate for men to get a tetravalent vaccine, and it is more appropriate for women to get a nine-valent vaccine.