Zhengye Biotechnology Holding Ltd is engaged in research, development, manufacturing, and sales of veterinary vaccines, with an emphasis on vaccines for livestock. It has a diverse range of vaccines, including vaccines for swine, cattle, goats, waterfowl, sheep, poultry, and pets, available in various provincial regions across China and are exported overseas to Vietnam, Pakistan, and Egypt. The company generates maximum revenue from the sale of swine vaccines, followed by poultry and other vaccines.