Recently, China National Accreditation Service for Conformity Assessment issued CNAS-CL01-G002:2021 “Measurement Traceability Requirements for Measurement Results”, which has been formally implemented on July 31, 2021. Measurement traceability is a prerequisite for mutual international recognition of measurement results CNAS regards measurement traceability as the basis for the validity of measurement results and ensures the metering of approved measurement activities. Quantity traceability meets the requirements of international standards.