1. Fire safety hazards, especially those in inflammable warehouses or operations

2. Electrical accidents, problems in the installation of substations and electrical facilities in the factory, such as failure to install leakage protection switches as required, etc.

3. Environmental accidents, such as abnormal discharge of waste water and waste gas, abnormal discharge of hazardous wastes, abnormal leakage of chemicals, etc.

4. Safety hazards of special equipment, such as elevators. We must always pay attention to the hidden dangers of this kind of equipment. 5. The hidden dangers in the operation process depend on the operation mode, such as whether there are risks in mechanical accidents and industrial hygiene.