According to the “New Crown Virus Vaccination Technical Guidelines (First Edition)”, in the event of special circumstances, it is possible to give the first injection to Ke Xing Zhongwei and the second injection to Beijing Biological. At present, China’s widely inoculated neocoronavirus vaccine mainly includes three inactivated vaccines: Beijing Bio, Wuhan Bio, and KXCV, which are recommended for intramuscular injection in the deltoid muscle of the upper arm. At this stage, it is recommended to use the same vaccine product from the same manufacturer to complete the vaccination, and if the vaccine supply is difficult, or if there is a restriction on the vaccination at a different location or under other special circumstances that makes it impossible to use the same vaccine product, the vaccine product may be appropriately switched to complete the vaccination within the specified time. If there are special circumstances such as difficulties in vaccine supply and restrictions on vaccination in other places, the vaccine can be switched appropriately and the vaccination can be completed within the specified time. It is not recommended that the new crown vaccine be given at the same time as other vaccines, and a 14-day interval should be considered for other vaccines, but the time interval can be disregarded in case of emergencies, such as tetanus, rabies virus, or immunoglobulin, and the time for the second dose of the new crown vaccine will be determined by the doctor according to the actual situation.