Cultivating large numbers of bacteria with specific pathogenic properties in the laboratory is a very dangerous and strictly controlled behavior, because these bacteria may pose a serious threat to human health and the environment, and such operations should not be performed at will. The research and operation of pathogenic bacteria are usually carried out in professional high-level biosafety laboratories, according to strict biosafety regulations and approval processes, by professionally trained and qualified personnel, under the condition of ensuring that safety protection is in place to carry out a small amount of necessary research and other work to prevent leakage and spread and cause harm. Any attempt to cultivate a large number of pathogenic bacteria without permission violates laws and regulations and biosafety principles, and will bring great public health risks.