Ketuo Biology (300858.SZ) stated on the investor interaction platform that postbiotics refers to genetically defined inactivated microorganisms and/or bacterial components that are beneficial to the host's health, including or excluding their metabolic products; excluding chemically synthesized components and viruses/bacteriophage and their products. Currently, the company's postbiotic products can be applied in snack food, daily chemicals, cosmetics, and female personal care products.