The skill tree opened after reaching level 4 specialty offered three choices: Suppression Fire, Precision Shooting, and Gun Fighting Skill.
The three skills actually had clear divisions of labor—
Precision Shooting was about enhancing long-range sniping proficiency, shooting more accurately with stronger penetration.
Suppression Fire tended toward mid-range combat, using a relentless barrage to cover targets to either kill or provide cover for teammates. It seemed that Song Ying possessed this skill.
Gun Fighting Skill was biased towards melee combat... Well, not exactly melee combat, but a skill that maintained the ability to move and shoot quickly even when entangled by an opponent.
And a skill was a skill—it contained certain supernatural elements.
Take Suppression Fire, for instance. Could a machine gun replace Suppression Fire? No, it could not.