1, first-class identification standard for industrial injuries and occupational diseases. Under any of the following 12 circumstances, it can be identified as a first-class work-related injury or occupational disease;
2, secondary industrial injury and occupational disease identification standards. Under any of the following 34 circumstances, it can be identified as a secondary work-related injury or occupational disease.
3, three-level industrial injury and occupational disease identification standards. Under any of the following 37 circumstances, it can be identified as a class III work-related injury or occupational disease.
4, four levels of industrial injury and occupational disease identification standards. Under any of the following 58 circumstances, it can be identified as a four-level work-related injury or occupational disease.