The synthesis of brand new virus strains that do not exist in nature is a matter of high concern and significant risks. From a technical point of view, with the development of bioengineering technology, it is theoretically possible to synthesize new viruses. Scientists can design and combine the genes of the virus to construct a completely new gene sequence, which in turn may create a completely new virus. However, this behavior has extremely serious consequences and huge controversy. On the one hand, the synthesis of new viruses may bring about an unpredictable public health crisis, trigger the spread of large-scale infectious diseases, and pose a serious threat to human health and global security. On the other hand, this also involves serious ethical and ethical issues, and may be maliciously used for illegal purposes such as biological weapons. There are strict international norms and restrictions on such research to ensure that its application is within a safe, controllable and ethical framework to prevent disastrous effects on humans and the ecological environment.