 It is intentionally similar in structure and categorisation to the ICD and DSM, the two most well-known diagnostic manuals, though it includes some variations on their main diagnoses and around 40 culturally related diagnoses.The first published Chinese psychiatric classificatory scheme appeared in 1979.A revised classification system, the CCMD-1, was made available in 1981 and further modified in 1984 (CCMD-2-R).