At the same time of inoculation, it is automatically carried out on vaccinated objects (such as cattle, sheep, pigs, horses and poultry) “ Has been inoculated with ” In this way, it can not only prevent repeated inoculation, but also prevent missed inoculation, which is of great significance for the prevention and control of animal diseases. This product is even more indispensable in the case of requiring 100% vaccination rate (such as porcine blue ear disease vaccination and foot-and-mouth disease vaccination).