Certification Introduction:

CNAS is the abbreviation of China National Accreditation Service for Conformity Assessment.
According to the provisions of the Regulations, a national accreditation agency established and authorized by the National Certification and Accreditation Administration (CNCA),
Be unified responsible for the accreditation of certification agencies, laboratories, inspection agencies and other relevant institutions.
CMA is laboratory qualification accreditation, also known as metrology certification. It is based on the Measurement Law of the People's Republic of China and the Chinese
In accordance with the regulations of the Certification and Accreditation Regulations of the People's Republic of China and other relevant laws and regulations, inspection agencies that issue notarized data for the society shall conduct
One means of compulsory assessment is the government's administrative licensing of third-party laboratories, and the government's authoritative department's inspection of testing institutions.
Formal recognition given by prescribed type testing. Only when a laboratory obtains a qualification certificate can it provide services to users, society and the government.
Conditions and qualifications for providing unbiased data.
Laboratory qualification accreditation in my country is managed uniformly by the National Certification and Accreditation Administration (CNCA) and is divided into national and provincial levels.
Two levels of implementation. The National Certification and Accreditation Administration Committee uniformly manages, supervises and comprehensively coordinates the qualification accreditation of laboratories.
The qualification accreditation of national laboratories is implemented by the National Certification and Accreditation Administration; the quality and technology of the people's governments of provinces, autonomous regions and municipalities
Supervisory departments and all directly affiliated entry-exit inspection and quarantine agencies shall be responsible for the qualification accreditation of laboratories within their respective jurisdictions in accordance with their respective responsibilities.
And supervision and inspection work, the qualification accreditation of local laboratories is implemented by the local quality inspection department.

Difference 1: Differences in review organizations
The review organization and issuing agency for CNAS laboratory accreditation certificates is the China National Accreditation Service for Conformity Assessment.
CMA is divided into provincial and national levels. The National Certification and Accreditation Administration is responsible for the qualification accreditation of national laboratories. Non-national laboratories are responsible for the qualification accreditation.
Generally, the quality and technical supervision bureau at the provincial level is responsible for organizing the review and issuance of certificates.
Difference 2: Differences in review principles
CNAS adheres to the principles of voluntariness and non-discrimination.
CMA is a mandatory assessment for inspection agencies that issue notarized data for the society.
Difference 3: Differences in legal status requirements for laboratories
CNAS accreditation has no restrictions on the legal status of the laboratory. It can be an internal laboratory or an independent laboratory.
Third-party laboratory.
The objects of CMA laboratory qualification certification need to be independent third-party laboratories and institutions affiliated to relevant government departments.
Laboratory, etc.
Difference 4: Difference in report effective range
Reports with the CNAS logo issued by CNAS-accredited laboratories within their accreditation scope can be used in multiple locations around the world.
National and regional access (both parties signed a Mutual Recognition Agreement MRA);
Reports issued by laboratories accredited by CMA within the scope of their accreditation are only valid domestically.