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The requirements for records in the new version of CNAS-CL01: Clause 7.5.1 of CNAS-CL01:2018 states that the laboratory shall ensure that the technical records of each laboratory activity contain the results, reports, and sufficient information to enable the identification, where possible, of the factors affecting the measurement results and their measurement uncertainties, and to ensure that the laboratory activity can be repeated under conditions as close as possible to the original ones. The technical record should include each laboratory activity, as well as the date and person responsible for reviewing the data results. The original observation results, data, and calculations should be recorded at the time of observation or acquisition, and identified according to specific tasks. CNAS’s documents only provide general guidelines; so what exactly should be done in actual laboratory operations? 2. Content of original records: Original records kept in a laboratory generally include the following: 1) Sample description ； 2) Sample unique identifier ； 3) The methods used, including detection, calibration, and sampling methods ； 4) The environmental conditions of the experiment, including temperature and humidity; for laboratory activities carried out outside the laboratory, special attention should be paid to these experimental conditions ； 5) The equipment used, including both the main equipment and the main auxiliary equipment, must be recorded ； 6) Reference materials used ； 7) Original observation results during the experiment ； 8) Calculations performed in the experiment based on the observation results ； 9) Personnel carrying out laboratory activities ； 10) Persons responsible for reviewing data ； 11) Location of the laboratory. 3 Methods of keeping original records 1) Laboratory original records should be recorded in record sheets or bound record books ； 2) The original record data can be directly entered into the information management system ； 3) The original records can also be data automatically collected by equipment or information systems. 4) Changes to data automatically collected or directly entered into the information management system shall meet the same requirements as paper records. 4 Copy of original record 1) When the original record needs to be organized or copied separately, the laboratory must retain a copy of the original record. 2) Laboratories shall not use a blank page to store original records arbitrarily; the above requirements can be referred to in the new version of CNAS-CL01-G001