The cervical cancer vaccine, also known as HPV vaccine, is now available in China, basically the 2, 4 and 9-valent vaccines are all imported vaccines. 2 valent is from the U.S., 2, 4 and 9 valent are from the U.S. or Germany. There is an age distinction here: the 2-valent vaccine can be given between the ages of 9 and 45, the 4-valent vaccine can be given between the ages of 20 and 45, and the 9-valent vaccine is now limited to the ages of 16 to 26. In fact, in foreign countries, the 2-valent, 4-valent, and 9-valent vaccines can be given from the age of 9 until the age of 60. However, because the age range of the population selected for phase IV clinical trials is different for the 2-, 4-, and 9-valent vaccines in China, there are age limits for the 2-, 4-, and 9-valent vaccines available in China. The 2-valent vaccine has the widest age range of 9-45 years old, the 4-valent vaccine is 20-45 years old, and the 9-valent vaccine is 16-26 years old.