The third shot of Xin Guan vaccine can be mixed, but the third shot of Anhui Zhifei’s Xin Guan vaccine cannot be mixed. If the first two shots are inactivated vaccines, common ones include Beijing Bio, Beijing Kexing, Changchun Bio, Lanzhou Bio, etc., which all belong to the category of inactivated vaccines, you can mix the third shot of the vaccine, and the booster shot can be chosen from inactivated vaccines, or adenovirus carrier vaccines such as Conhexinol, which can enhance the protective effect. However, if the first two doses of Anhui Zhifei vaccine, whose technical route is different from the inactivated vaccine, belongs to the recombinant protein vaccine, the third dose of Anhui Zhifei vaccine must also be given, and cannot be mixed with other vaccines. Please consult your physician for more information about the vaccine.