Manufacturing simple gas masks at home has extremely high risks and cannot ensure protective effects, especially when used in toxic and harmful environments, which may lead to serious health hazards and even life-threatening. Chinese laws and regulations strictly prohibit individuals from manufacturing or modifying protective equipment without authorization, especially in hazardous environments involving chemicals, toxic gases, etc., professional protective equipment that meets national standards (GB) must be used. **For the safety of your life, please be sure to：** 1. **Purchase formal protective equipment** Choose products that meet the GB 2890-2009 "Respiratory protection Self-priming Filter Gas mask" standard, and ensure that the filter cartridge is effective for specific pollutants (such as organic gases, acid gases, etc.). 2. **Correct response in emergency situations** -In case of a toxic gas leak, evacuate the scene immediately and call 119 or the local emergency number. -You can cover your mouth and nose with a wet towel to block smoke for a short time (only fire smoke, not effective for toxic gases), but you must evacuate as soon as possible. 3. **Scientific protection knowledge** Protective equipment needs to strictly match usage scenarios, such as： -Dust masks (such as N95) are only suitable for particulate matter and are not gas-proof. -Gas masks need to be checked regularly for air tightness and replaced with filter tanks. **Please do not try to make your own protective tools**, wrong use may accelerate poisoning. There is no trivial matter in life safety. Investing in professional protection is a responsible choice for yourself and your family.