On Nov. 30, 2017, the former China Food and Drug Administration (CFDA) started to require manufacturers of class 2.2/2.3/2.4/3/4/5 drugs' active pharmaceutical ingredients to file drug master files (DMFs). DMFs are also required for exipients and packaing materials of all classes of drugs. The filed DMFs enter the associated review together with the finished drug product's application.
Related: China Drug Master File (DMF) for APIs, Pharmaceutical Excipients & Packaging Materials