The origin of cf
The network term CF refers to online games that cross the line of fire. The reason why it is called CF is because its English name is CrossFire. Most players will refer to CrossFire as CF for short, which is also the origin of CF.
In addition to retaining the traditional fighting mode, Crossing the Fire Line also adds a fresh ghost mode to exercise the player's ability to listen, capture vision and react quickly through stealth effect. I believe that the new model will bring more popularity to the firewire, and then let the FPS online game market step into a higher hall.