CNAs, the abbreviation of China National Accreditation Commission for conformity assessment, is a national accreditation body approved and authorized by the national certification and accreditation administration according to the regulations of the people's Republic of China on certification and accreditation. It is responsible for the accreditation of certification bodies, laboratories, inspection institutions and other related institutions. CNAs laboratory accreditation is a formal recognition of the laboratory's ability to carry out specified types of testing and / or calibration.