Double safety of gas stove means that we don't turn off the main gas valve every time we use gas for cooking, but just turn off the gas stove valve directly, which is very dangerous! Although some people also close the main valve of gas cylinders, the order and method of operation are also wrong.

Therefore, the correct way to close the valve of the gas tank should be to tighten the main valve on the gas cylinder first, and then close the valve of the gas stove after the fire of the gas stove naturally goes out, so as to achieve double insurance.