The revision to the Administrative Measures for Diagnosis and Identification of Occupational Diseases[1] (NHC Order 6) was published by China’s National Health Commission (NHC) and took effect immediately on January 4, 2021.With the dramatic economic development over the past years, a high incidence of occupational diseases was found to be one of the main health problems. To further standardize the requirements and time for diagnosis and identification of occupational diseases, the Measures which was originally formulated in 2013 was revised. The major amendments[2] are summarized as below.