Ultimate Firepower

This world is not just the familiar appearance of ordinary people, but also contains an underground world that ordinary people cannot access. Government agents secretly handle troubles, assassins hired by financial tycoons secretly eliminate problems. There are assassins, mercenaries, arms dealers, and also agents, there is an underground network connecting this world, and also financial tycoons trying to control everything with money. Gao Yi entered the underground world, with his invincible close combat ability, he has created his own territory. But this world has guns. Beyond seven steps, the gun is fast. Within seven steps, the gun is both accurate and fast. Only within three steps is Gao Yi's fist the fastest. If you can't beat them, join them, Gao Yi chooses everything. Everything, become the assassin king in the mercenary world, the assassin king in the eyes of agents, the agent king in the eyes of assassins, become the intelligence king in the eyes of arms dealers. Until he is crowned king in the entire underground world, Gao Yi...