How to use the portable fire extinguisher, stand upwind or crosswind of the fire source, and remember the "four character formula":
Lift the grip.
Lift - lift the fire extinguisher;
Pull - pull out the safety bolt; First rotate the pin, and then pull out all the pins;
Hold - hold the nozzle;
Press - press down the handle. Hold the hose on the fire extinguisher bottle, point the outlet of the hose at the fire source you want to extinguish, and press the handle.