On May 23 of 2001, Sichuan fire brigade used the two common siphon type Pq8 foam gun towards 50 square meters of gasoline oil pool in the backyard of no.2 secret services group.After one minute burning, they used active plant flame retardant agent to put down fire. It only took 13 seconds to put down the fire! For such an amazing effect, the agent received favourable comments from all Sichuan fire prevention officers and soldiers.