Chongqing Zhifei Biological Products Co.,Ltd is principally engaged in the research, development, production and distribution of vaccine and other biological products. The Company's major products include AC meningococcal polysaccharide conjugate vaccine, group ACYW135 meningococcal polysaccharide vaccine and mycobacterium vaccine for injection, among others. The Company also distributes Hib vaccine and attenuated live hepatitis A vaccine as exclusive agency. The Company mainly markets its products within domestic markets, including east China, central China, south China and southwest China as its major markets.