Load exceeds the limit: physical load exceeds the limit (refers to load exceeding the limit that is prone to fatigue, strain, injury, etc.), hearing load exceeds the limit, vision load exceeds the limit, other load exceeds the limit

Abnormal health status (refers to injury, illness, etc.)

Engage in taboo homework

Psychological abnormalities: emotional abnormalities, risk-taking psychology, excessive tension, other psychological abnormalities

Identification function defects: perceived delay, identification errors, other identification function defects

Other psychological, physiological hazards and harmful factors

Command error: Command error (including command of managers at all levels during the production process), illegal command, other command errors

Operation error: erroneous operation, illegal operation, other operation errors

Guardian error

Other behavioral hazards and harmful factors (including violations of labor discipline such as quitting the post)

Defects in equipment, facilities, tools and accessories (insufficient strength, insufficient stiffness, poor stability, poor sealing, poor corrosion resistance, concentrated stress, appearance defects, exposed moving parts, manipulator defects, brake defects, controller defects, equipment, facilities, tools, accessories, other defects), such as: scaffolding and support frame strength, insufficient stiffness, poor braking of motor vehicles in the factory, severe wear of lifting wire ropes

Protection defects (no protection, defects in protective devices and facilities, improper protection, improper support, insufficient protection distance, other protection defects), such as: insufficient safety distance for electrical operations

Electrical damage (naked live parts, leakage, static electricity and stray currents, electric sparks, other electrical damage), such as: wire connectors are not bandaged, chemical fiber clothing produces static electricity in flammable and explosive environments

Noise (mechanical noise, electromagnetic noise, fluid dynamic noise, other noise), such as noise generated when working with hand-wind drills, air compressors, and ventilators

Vibration hazards (mechanical vibration, electromagnetic vibration, fluid dynamic vibration, other vibration hazards), such as: vibration during hand-wind drilling

Ionizing radiation (X-rays, gamma rays, α-particles, beta-particles, neutrons, protons, high-energy electron beams, etc.)

Non-ionizing radiation (UV radiation, laser radiation, microwave radiation, ultra-high frequency radiation, high frequency electromagnetic field, industrial frequency electric field)

Sports animals damage (projection, splash, fallen objects, rebound objects, rock and soil sliding, pile stacking sliding, airflow rolling, other sports animals damage)

Open flames, high-temperature substances (high-temperature gases, high-temperature liquids, high-temperature solids, other high-temperature substances)

Low-temperature substances (low-temperature gases, low-temperature solids, low-temperature liquids, other low-temperature substances)

Signal defects (no signal facilities, improper signal selection, improper signal position, unclear signal, inaccurate signal display, other signal defects)

Sign defects (no sign, unclear sign, irregular sign, improper selection of signs, defects in position of signs, other sign defects)

Harmful light (direct light, reflected light, glare, strobe effect, etc.)

Other physical hazards and harmful factors

Explosives, compressed and liquefied gases, flammable liquids, flammable solids, spontaneous ignition items and flammable items when wet

Oxidants and peroxides, drugs, radioactive items, corrosive items, dust and aerosols

Other chemical hazards and harmful factors

Pathogenic microorganisms (bacteria, virus, fungi, other pathogenic microorganisms)

Infectious disease vectors

Causing animals and plants

Other biological hazards and harmful factors

Indoor floors are slippery, narrow workplaces, messy site, uneven floors, ladder frame defects, opening defects on floor walls and ceilings, house foundation sinking, safety passages and outlet defects, poor lighting, poor air, unwell temperature, humidity and air pressure, poor water supply and drainage, indoor water gushing, other indoor working places

Harsh climate and environment, workplaces and traffic facilities are slippery, workplaces are narrow, messy, and uneven, narrow waterways, reefs or dangerous shoals, scaffolding, stairs and movable ladders, floor opening defects, building and other structural defects, door and fence defects, workplace foundation sinking, safety passage or outlet defects, poor lighting, poor air, workplace temperature and humidity and air pressure discomfort, water gushing in the workplace, and other outdoor workplace environments

Tunnel top surface defects, front or side wall defects, ground defects, poor air on the underground operation surface, underground fire, impact on the ground, ground water, improper oxygen supply in the underwater operation, and other poor underground (underwater) operation environments

Forced position, poor comprehensive operating environment, other operating environment not included above

The "three simultaneous" system for construction projects has not been implemented

Improper operating procedures

Accident emergency plan and response defects

Incomplete training system

Other occupational safety and health management rules and regulations are not sound (including hidden danger management, accident investigation and handling systems, etc.)